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Fuck therians!!!!!!!!!!!!
 
Fuck therians!!!!!!!!!!!!
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">'''Anal sex''' (also called '''anal intercourse''') is the [http://en.wikipedia.org/wiki/Sex_act sex act] in which the [http://en.wikipedia.org/wiki/Penis penis] is inserted into the [http://en.wikipedia.org/wiki/Anus anus] of a [http://en.wikipedia.org/wiki/Sexual_partner sexual partner].<sup class="reference" id="cite_ref-Dean_and_Delvin_0-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Anal_Sex_1-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Anal_Sex-1 [2]]</sup> The term can also include other sexual acts involving the anus, including [http://en.wikipedia.org/wiki/Pegging_(sexual_practice) pegging],[http://en.wikipedia.org/wiki/Anilingus anilingus], [http://en.wikipedia.org/wiki/Fingering_(sexual_act) fingering], and [http://en.wikipedia.org/wiki/Sex_toy object insertion].<sup class="reference" id="cite_ref-Dean_and_Delvin_0-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Anal_Sex_1-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Anal_Sex-1 [2]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">While anal sex is commonly associated with male [http://en.wikipedia.org/wiki/Homosexuality homosexuality], research shows that not all gay males engage in anal sex and that it is not uncommon in [http://en.wikipedia.org/wiki/Heterosexuality heterosexual] relationships.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Not_all_2-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Not_all-2 [3]]</sup><sup class="reference" id="cite_ref-Robin_Bell_3-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Robin_Bell-3 [4]]</sup><sup class="reference" id="cite_ref-Hock_4-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Hock-4 [5]]</sup> Types of anal sex can also be a part of [http://en.wikipedia.org/wiki/Lesbian lesbian] sexual practices.<sup class="reference" id="cite_ref-Newman_5-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Newman-5 [6]]</sup></p>
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==Many people find anal sex pleasurable, and some may reach [http://en.wikipedia.org/wiki/Orgasm orgasm] — through stimulation of the [http://en.wikipedia.org/wiki/Prostate prostate] in men, and [http://en.wikipedia.org/wiki/Clitoris clitoral] and [http://en.wikipedia.org/wiki/G-Spot G-Spot] leg stimulation in women.<sup class="reference" id="cite_ref-Male_hot_spot_6-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Male_hot_spot-6 [7]]</sup><sup class="reference" id="cite_ref-Answer_7-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Answer-7 [8]]</sup><sup class="reference" id="cite_ref-Taormino_8-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Taormino-8 [9]]</sup><sup class="reference" id="cite_ref-Valdez_9-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Valdez-9 [10]]</sup> However, many people find it painful as well, sometimes extremely so,<sup class="reference" id="cite_ref-Anal_Pain_10-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Anal_Pain-10 [11]]</sup><sup class="reference" id="cite_ref-Heidelbaugh_11-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heidelbaugh-11 [12]]</sup> which may be [http://en.wikipedia.org/wiki/Psychosomatic psychosomatic] in some cases.<sup class="reference" id="cite_ref-Heidelbaugh_11-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heidelbaugh-11 [12]]</sup> As with most forms of sexual interaction, individuals are at risk for contracting [http://en.wikipedia.org/wiki/Sexually_transmitted_disease sexually transmitted diseases],<sup class="reference" id="cite_ref-Who_12-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Who-12 [13]]</sup><sup class="reference" id="cite_ref-CDC_13-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-CDC-13 [14]]</sup> and therefore [http://en.wikipedia.org/wiki/Safe_sex safe-sex] practices are advised.<sup class="reference" id="cite_ref-Who_12-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Who-12 [13]]</sup> Anal sex is considered a high-risk sexual practice, and unprotected anal sex is the riskiest of all forms of sexual intercourse,<sup class="reference" id="cite_ref-Dean_and_Delvin_0-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup> due to the vulnerability of the rectum and sphincter tissues.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Anal_Sex_1-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Anal_Sex-1 [2]]</sup> It generally requires a generous application of a [http://en.wikipedia.org/wiki/Personal_lubricant personal lubricant] to prevent tearing, since the anus does not have sufficient [http://en.wikipedia.org/wiki/Vaginal_lubrication natural lubrication].<sup class="reference" id="cite_ref-Dean_and_Delvin_0-5" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Carroll_14-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Carroll-14 [15]]</sup>Anatomy and stimulation==
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See also: [http://en.wikipedia.org/wiki/Prostate_massage Prostate massage][http://en.wikipedia.org/wiki/File:Male_anatomy_en.svg][http://en.wikipedia.org/wiki/File:Male_anatomy_en.svg]Male genital anatomy, showing the location of the prostate with respect to the rectum<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The abundance of [http://en.wikipedia.org/wiki/Nerve_endings nerve endings] in the anal region and rectum makes anal sex pleasurable for many men and women.<sup class="reference" id="cite_ref-AnalHealth_15-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-AnalHealth-15 [16]]</sup> "The opening and closing of the anus is controlled by the internal and external [http://en.wikipedia.org/wiki/Sphincter sphincter] muscles (the most important muscles when engaging in anal sex). The sphincter muscle is a sensitive membrane with many nerve endings and thus the source of pleasure or pain."<sup class="reference" id="cite_ref-gaylife.about.com_16-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-gaylife.about.com-16 [17]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In a male receiving partner, being penetrated can produce a pleasurable sensation due to the inserted penis rubbing or brushing against the [http://en.wikipedia.org/wiki/Prostate prostate] (also known as the "male G-Spot", "P-Spot" or "A-Spot") through the anal wall.<sup class="reference" id="cite_ref-Male_hot_spot_6-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Male_hot_spot-6 [7]]</sup><sup class="reference" id="cite_ref-17" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-17 [18]]</sup> This can result in pleasurable sensations and can lead to an [http://en.wikipedia.org/wiki/Orgasm orgasm] in some cases.<sup class="reference" id="cite_ref-Male_hot_spot_6-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Male_hot_spot-6 [7]]</sup><sup class="reference" id="cite_ref-Answer_7-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Answer-7 [8]]</sup> "For some men, prostate stimulation produces an orgasm that they describe as 'deeper,' more global and intense, longer-lasting, and associated with greater feelings of ecstasy than orgasm elicited by penile stimulation only."<sup class="reference" id="cite_ref-Answer_7-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Answer-7 [8]]</sup> The prostate is located next to the rectum and is the larger, more developed<sup class="reference" id="cite_ref-Prostate_18-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Prostate-18 [19]]</sup> male [http://en.wikipedia.org/wiki/Homology_(biology) homologue] to the [http://en.wikipedia.org/wiki/Skene%27s_glands Skene's glands] (which are believed to be connected to the female [http://en.wikipedia.org/wiki/G-Spot G-Spot]).<sup class="reference" id="cite_ref-www.newscientist.com_19-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-www.newscientist.com-19 [20]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Research shows that most women (70–80%) achieve orgasm only through direct [http://en.wikipedia.org/wiki/Clitoris clitoral] stimulation.<sup class="reference" id="cite_ref-Clitoris_20-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Clitoris-20 [21]]</sup><sup class="reference" id="cite_ref-Weeks_21-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Weeks-21 [22]]</sup><sup class="reference" id="cite_ref-Flaherty_22-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Flaherty-22 [23]]</sup><sup class="reference" id="cite_ref-Lloyd_23-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Lloyd-23 [24]]</sup> The clitoris surrounds the vagina somewhat like a horseshoe and its tip or glans alone has more than 8,000 sensory [http://en.wikipedia.org/wiki/Nerve_ending nerve endings], more than any other part of the human body.<sup class="reference" id="cite_ref-Cornforth_24-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Cornforth-24 [25]]</sup> In addition to nerve endings present within the anus and rectum, women may find anal stimulation pleasurable due to the "legs" of the clitoris which extend along the vaginal lips back to the anus.<sup class="reference" id="cite_ref-Doin.27_the_butt_25-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Doin.27_the_butt-25 [26]]</sup> The [http://en.wikipedia.org/wiki/Ernst_Gr%C3%A4fenberg Gräfenberg] spot, or G-Spot – a small area behind the female pubic bone surrounding the [http://en.wikipedia.org/wiki/Urethra urethra] and accessible through the anterior wall of the vagina – is considered to have legs in relation to the clitoris.<sup class="reference" id="cite_ref-Answer_7-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Answer-7 [8]]</sup><sup class="reference" id="cite_ref-O.27Connell_26-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-O.27Connell-26 [27]]</sup><sup class="reference" id="cite_ref-Masters_and_Johnson_27-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Masters_and_Johnson-27 [28]]</sup> Besides their accessibility, orgasm by stimulation of the clitoris or G-Spot through anal penetration is made possible because a thin membrane is all that separates the vaginal cavity from the rectal cavity, allowing for indirect stimulation.<sup class="reference" id="cite_ref-Newman_5-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Newman-5 [6]]</sup><sup class="reference" id="cite_ref-Answer_7-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Answer-7 [8]]</sup><sup class="reference" id="cite_ref-Taormino_8-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Taormino-8 [9]]</sup><sup class="reference" id="cite_ref-Valdez_9-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Valdez-9 [10]]</sup> Only a small percentage of women are able to orgasm from this type of stimulation alone.<sup class="reference" id="cite_ref-Valdez_9-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Valdez-9 [10]]</sup> Direct stimulation of the clitoris, G-Spot, or both, during anal sex can help some women to enjoy the experience and reach orgasm.<sup class="reference" id="cite_ref-DeCitore_28-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-DeCitore-28 [29]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In pornography, anal sex is often presented as routine and painless, but according to [http://en.wikipedia.org/wiki/Go_Ask_Alice! Go Ask Alice!] and other researchers, anal sex occurs "much less frequently" than other sexual behaviors and can be painful if not performed with care.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-6" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Not_all_2-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Not_all-2 [3]]</sup> The increase of anal activity among heterosexuals has been linked to the increase in anal pornography,<sup class="reference" id="cite_ref-Dean_and_Delvin_0-7" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup> and the association with dominance and [http://en.wikipedia.org/wiki/Taboo taboo] make anal sex appealing to people of all sexual orientations.<sup class="reference" id="cite_ref-Understanding_29-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Understanding-29 [30]]</sup><sup class="reference" id="cite_ref-dailyuw.com_30-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-dailyuw.com-30 [31]]</sup> Moreover, the opening of the anus (its sphincter) is usually tighter than a vagina, which can yield greater tactile pleasure for the man via his penis.<sup class="reference" id="cite_ref-Taormino_8-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Taormino-8 [9]]</sup><sup class="reference" id="cite_ref-Understanding_29-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Understanding-29 [30]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">While each person's sphincter muscles react to penetration differently, the anal sphincter in general has delicate tissue that can tear, and the rectal [http://en.wikipedia.org/wiki/Mucous_membrane mucous membrane] provides insufficient lubrication for sexual penetration. Researchers say adequate [http://en.wikipedia.org/wiki/Personal_lubricant lubrication], relaxation, and communication between sexual partners are crucial to avoid pain or damage to the anus.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-8" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Heidelbaugh_11-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heidelbaugh-11 [12]]</sup><sup class="reference" id="cite_ref-Carroll_14-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Carroll-14 [15]]</sup><sup class="reference" id="cite_ref-lubrication_31-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-lubrication-31 [32]]</sup> Ensuring that the anal area is clean and the bowel is empty (for both aesthetics and practicality) is also advised.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-9" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup></p>
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==Heterosexual==
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===Male to female===
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[http://en.wikipedia.org/wiki/File:Anal_Intercourse_Artwork.jpg][http://en.wikipedia.org/wiki/File:Anal_Intercourse_Artwork.jpg]1892 [http://en.wikipedia.org/wiki/Lithograph lithograph] by [http://en.wikipedia.org/wiki/%C3%89douard-Henri_Avril Paul Avril] depicting male-to-female anal sex<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Some men may enjoy being the insertive partner in anal sex because the anal sphincter is usually tighter than a vagina, which can yield greater tactile pleasure for the man via his penis.<sup class="reference" id="cite_ref-Taormino_8-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Taormino-8 [9]]</sup><sup class="reference" id="cite_ref-Understanding_29-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Understanding-29 [30]]</sup> The attitude of women towards being the receptive partner in this practice is diverse: while some consider it painful or uncomfortable, others find it pleasurable and some even prefer it to [http://en.wikipedia.org/wiki/Sexual_intercourse vaginal intercourse].<sup class="reference" id="cite_ref-Taormino_8-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Taormino-8 [9]]</sup><sup class="reference" id="cite_ref-32" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-32 [33]]</sup> Unlike the clitoris or anus, the vaginal walls "contain relatively few nerve endings, making intense sexual stimulation, pleasure, and orgasm from vaginal-only penetration unlikely" and "it's generally only the lower third of the vagina that has enough nerve endings to feel any stimulation at all from a penis, finger, toy, or other penetrative object".<sup class="reference" id="cite_ref-Can.27t_feel_33-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Can.27t_feel-33 [34]]</sup> Vaginal intercourse may, however, promote a satisfying feeling of fullness or closeness with a sexual partner.<sup class="reference" id="cite_ref-No_stimulation_34-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-No_stimulation-34 [35]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In a study of heterosexual anal sex – (8/2010 (n=214)) – female participants stated that stimulation to multiple erogenous zones simultaneously (the clitoris, the G-Spot, the anus, or other erogenous zones) enabled them to enjoy anal intercourse with much less discomfort compared to anal penetration by itself. When accompanied by one or more of the other stimuli, women were able to orgasm and those who did reported that an orgasm during anal sex is more of a full-body experience than an orgasm from clitoral stimulation alone.<sup class="reference" id="cite_ref-DeCitore_28-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-DeCitore-28 [29]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Anal sex is held to carry a very low risk of unwanted [http://en.wikipedia.org/wiki/Human_pregnancy pregnancy] when not accompanied with vaginal intercourse, as anal intercourse cannot lead to pregnancy unless sperm is somehow transported to the vaginal opening in the process; in some populations, this activity is frequently used as a means of contraception, often in the absence of a condom.<sup class="reference" id="cite_ref-35" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-35 [36]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The risk to the woman is greater than the risk to the man during male-to-female anal intercourse.<sup class="reference" id="cite_ref-36" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-36 [37]]</sup> The risk of injury to the receptive partner due to anal intercourse is many times higher than that due to vaginal sex,<sup class="reference" id="cite_ref-37" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-37 [38]]</sup> and the risk for transmission of HIV is higher for anal sex than for vaginal sex.<sup class="reference" id="cite_ref-38" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-38 [39]]</sup> Experts caution couples engaging in this practice to use protection, such as condoms, to stop the transmission of STDs.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-10" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup> Additionally, the man should never move from anal sex immediately to vaginal sex while [http://en.wikipedia.org/wiki/Bareback_(sex) barebacking] or without changing the condom, due to infections that can arise in the vagina by bacteria present within the anus; this also applies to the use of sex toys.<sup class="reference" id="cite_ref-Doin.27_the_butt_25-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Doin.27_the_butt-25 [26]]</sup><sup class="reference" id="cite_ref-healthyplace.com_39-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-healthyplace.com-39 [40]]</sup><sup class="reference" id="cite_ref-SHR_40-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-SHR-40 [41]]</sup></p>
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====Female virginity====
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Male-to-female anal sex is often viewed as preserving female [http://en.wikipedia.org/wiki/Virginity virginity] because it is non-procreative and leaves the [http://en.wikipedia.org/wiki/Hymen hymen] intact. Among sexually active heterosexuals, the concept of "[http://en.wikipedia.org/wiki/Technical_virgin technical virginity]", which includes [http://en.wikipedia.org/wiki/Oral_sex oral sex] and [http://en.wikipedia.org/wiki/Mutual_masturbation mutual masturbation], is conceived as resting solely on penile-vaginal penetration.<sup class="reference" id="cite_ref-Intimate_41-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Intimate-41 [42]]</sup><sup class="reference" id="cite_ref-Wood_42-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Wood-42 [43]]</sup><sup class="reference" id="cite_ref-Regnerus_43-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Regnerus-43 [44]]</sup><sup class="reference" id="cite_ref-Jayson_44-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Jayson-44 [45]]</sup> Since the early 1990s, "technical virginity" has been popular among U.S. [http://en.wikipedia.org/wiki/Adolescence teenagers] (also see [http://en.wikipedia.org/wiki/Saddlebacking saddlebacking]).<sup class="reference" id="cite_ref-Regnerus_43-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Regnerus-43 [44]]</sup><sup class="reference" id="cite_ref-Jayson_44-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Jayson-44 [45]]</sup></p>
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====Prevalence====
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In 1992, a study conducted by the U.S. [http://en.wikipedia.org/wiki/Centers_for_Disease_Control_and_Prevention Centers for Disease Control and Prevention] found that only 26% of men 18 to 59 and 20% of women 18 to 59 had engaged in heterosexual anal sex; a similar 2005 survey (also conducted by the U.S. Centers for Disease Control and Prevention) found a rising incidence of anal sex relations in the American heterosexual population. The survey showed that 40% of men and 35% of women between 25 and 44 had engaged in heterosexual anal sex.<sup class="reference" id="cite_ref-45" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-45 [46]]</sup> In terms of overall numbers of survey respondents, seven times as many women as gay men said that they engaged in anal intercourse, with this figure reflecting the larger heterosexual population size.<sup class="reference" id="cite_ref-46" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-46 [47]]</sup> According to a study from the [http://en.wikipedia.org/wiki/National_Survey_of_Sexual_Health_and_Behavior National Survey of Sexual Health and Behavior] (NSSHB) that was authored by Dr. [http://en.wikipedia.org/wiki/Debby_Herbenick Debby Herbenick] and other researchers, although anal intercourse is reported by fewer women than other partnered sex behaviors, partnered women in the age groups between 18–49 are significantly more likely to report having anal sex in the past 90 days.<sup class="reference" id="cite_ref-47" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-47 [48]]</sup> As of 2011, this survey provides the most up to date data about anal sex at the population level.</p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In a 2007 report entitled ''Prevalence and Correlates of Heterosexual Anal and Oral Sex in Adolescents and Adults in the United States'', published in the Journal of Infectious Disease, a national survey of Family Growth found that 34% men and 30% women reported ever participating in heterosexual anal sex. The percentage of participants reporting heterosexual anal sex was significantly higher among 20- to 24-year-olds and peaked among 30- to 34-year-olds.<sup class="reference" id="cite_ref-EroticFlow_48-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-EroticFlow-48 [49]]</sup><sup class="reference" id="cite_ref-49" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-49 [50]]</sup> Another survey in, 2008, focused on a much younger demographic of teenagers and young adults, aged 15–21. It found that 16% of 1350 surveyed had had this type of sex in the previous 3 months, with condoms being used 29% of the time.<sup class="reference" id="cite_ref-50" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-50 [51]]</sup> However, given the subject matter, the survey hypothesized the prevalence was probably underestimated.</p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In 2009, Kimberly R. McBride published a clinical report in ''[http://en.wikipedia.org/wiki/The_Journal_of_Sex_Research The Journal of Sex Research]'' which stated that changing norms may affect the frequency of heterosexual anal sex behaviors and suggests that there is a role for the ''exotic'' in the sexual repertoires of some heterosexuals" "[F]or a certain number of heterosexuals, anal intercourse is pleasurable, exciting, and perhaps considered more intimate than vaginal sex...". McBride and her colleagues investigated the prevalence of non-intercourse anal sex behaviors among a sample of men (n=1,299) and women (n=1,919) compared to anal intercourse experience and found that 51% of men and 43% of women had participated in at least one act of oral–anal sex, manual–anal sex, or anal sex toy use.<sup class="reference" id="cite_ref-EroticFlow_48-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-EroticFlow-48 [49]]</sup><sup class="reference" id="cite_ref-Heterosexualanal2010_51-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heterosexualanal2010-51 [52]]</sup> McBride and Janssen found that the majority of men (n=631) and women (n=856) who reported heterosexual anal intercourse in the past 12 months were in exclusive, monogamous relationships: 69% and 73%, respectively.<sup class="reference" id="cite_ref-EroticFlow_48-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-EroticFlow-48 [49]]</sup><sup class="reference" id="cite_ref-Heterosexualanal2010_51-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heterosexualanal2010-51 [52]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Figures for prevalence can vary amongst different demographics, regions, and nationalities. A 2001 French survey of five hundred female respondents concluded that a total of 29% had engaged in this practice, with one third of these confirming to have enjoyed the experience.<sup class="reference" id="cite_ref-French_52-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-French-52 [53]]</sup> In contrast, in a 1999 South Korean survey of 586 women, 3.5% of respondents reported having had this type of sex.<sup class="reference" id="cite_ref-53" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-53 [54]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Figures for the prevalence of sexual behavior can also fluctuate over time. Edward O. Laumann's 1992 survey, reported in ''The Social Organization of Sexuality: Sexual Practices in the United States'', found that about 20% of heterosexuals had engaged in male-to-female anal sex. [http://en.wikipedia.org/wiki/Sexology Sex researcher] [http://en.wikipedia.org/wiki/Alfred_Kinsey Alfred Kinsey], working in the 1940s, had found that number to be closer to 40% at the time. More recently, a researcher from the [http://en.wikipedia.org/wiki/University_of_British_Columbia University of British Columbia] in 2005 put the number of heterosexuals who have engaged in this practice at between 30% and 50%.<sup class="reference" id="cite_ref-54" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-54 [55]]</sup> According to [http://en.wikipedia.org/wiki/Columbia_University Columbia University]'s health website [http://en.wikipedia.org/wiki/Go_Ask_Alice! Go Ask Alice!]: "Studies indicate that about 25 percent of heterosexual couples have had anal sex at least once, and 10 percent regularly have anal penetration."<sup class="reference" id="cite_ref-Not_all_2-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Not_all-2 [3]]</sup></p>
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===Female to male (pegging)===
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[http://en.wikipedia.org/wiki/File:Wiki-pegging.png][http://en.wikipedia.org/wiki/File:Wiki-pegging.png]A woman wearing a strap-on dildo about to engage in anal sex with a man.See also: [http://en.wikipedia.org/wiki/Pegging_(sexual_practice) Pegging (sexual practice)]<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">'''Pegging''' is a sexual practice in which a woman penetrates a man's anus with a [http://en.wikipedia.org/wiki/Strap-on_dildo strap-on dildo].<sup class="reference" id="cite_ref-55" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-55 [56]]</sup> Advice columnist [http://en.wikipedia.org/wiki/Dan_Savage Dan Savage] wrote that he believes all men should try pegging at least once, as it may introduce them to a new enjoyable sexual activity and illuminate them to the receiver's perspective in sex.<sup class="reference" id="cite_ref-sl_56-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-sl-56 [57]]</sup> A few instructional movies and books have emerged in recent years, including ''[http://en.wikipedia.org/wiki/Bend_Over_Boyfriend Bend Over Boyfriend]'', produced by Fatale Media, Inc., and directed by Shar Rednour, SIR Video co-founder. As an accomplished author of numerous sex guides and informational books on various sexual taboos,[http://en.wikipedia.org/wiki/Violet_Blue_(author) Violet Blue] wrote and released ''The Adventurous Couple's Guide to Strap-On Sex'' in 2007.<sup class="reference" id="cite_ref-Blue2007_57-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Blue2007-57 [58]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The [http://en.wikipedia.org/wiki/National_Institutes_of_Health National Institutes of Health] (NIH), with information published in the ''[http://en.wikipedia.org/wiki/British_Medical_Journal British Medical Journal]'' (BMJ), states that, "There are little published data on how many heterosexual men would like their anus to be sexually stimulated in a heterosexual relationship," but that, "Anecdotally, it is a substantial number. What data we do have almost all relate to penetrative sexual acts, and the superficial contact of the anal ring with fingers or the tongue is even less well documented but may be assumed to be a common sexual activity for men of all sexual orientations."<sup class="reference" id="cite_ref-Robin_Bell_3-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Robin_Bell-3 [4]]</sup></p>
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==Homosexual==
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===Male to male===
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[http://en.wikipedia.org/wiki/File:%C3%89douard-Henri_Avril_(18).jpg][http://en.wikipedia.org/wiki/File:%C3%89douard-Henri_Avril_(18).jpg]19th-century erotic interpretation of[http://en.wikipedia.org/wiki/Hadrian Hadrian] and [http://en.wikipedia.org/wiki/Antinous Antinous], by [http://en.wikipedia.org/wiki/%C3%89douard-Henri_Avril Paul Avril]<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Historically, anal sex has been commonly associated with male homosexuality. However, many [http://en.wikipedia.org/wiki/Men_who_have_sex_with_men men who have sex with men] do not engage in anal sex.<sup class="reference" id="cite_ref-Dean_and_Delvin_0-11" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Dean_and_Delvin-0 [1]]</sup><sup class="reference" id="cite_ref-Not_all_2-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Not_all-2 [3]]</sup><sup class="reference" id="cite_ref-Johnson_and_Johnson_58-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Johnson_and_Johnson-58 [59]]</sup><sup class="reference" id="cite_ref-Underwood_59-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Underwood-59 [60]]</sup> Among men who have anal sex with other men, the insertive partner is called the ''[http://en.wikipedia.org/wiki/Top,_bottom_and_versatile#Top top]'' and the one being penetrated is called the ''[http://en.wikipedia.org/wiki/Top,_bottom_and_versatile#Bottom bottom].'' Those who enjoy either role are referred to as ''[http://en.wikipedia.org/wiki/Versatile_(sex) versatile]''.<sup class="reference" id="cite_ref-Underwood_59-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Underwood-59 [60]]</sup><sup class="reference" id="cite_ref-60" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-60 [61]]</sup><sup class="reference" id="cite_ref-61" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-61 [62]]</sup> Gay men who prefer anal sex may view it as "[their] version of intercourse"<sup class="reference" id="cite_ref-dailyuw.com_30-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-dailyuw.com-30 [31]]</sup> and as "the natural apex of sex, a wonderful expression of intimacy, and a great source of pleasure".<sup class="reference" id="cite_ref-Johnson_and_Johnson_58-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Johnson_and_Johnson-58 [59]]</sup> Psychologist Walt Odets said, "I think that anal sex has for gay men the same emotional significance that vaginal sex has for heterosexuals."<sup class="reference" id="cite_ref-Advocate.com_62-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Advocate.com-62 [63]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Some men who have sex with men prefer to engage in [http://en.wikipedia.org/wiki/Frot frot] or other forms of [http://en.wikipedia.org/wiki/Mutual_masturbation mutual masturbation] because they find it more pleasurable or more affectionate, to preserve [http://en.wikipedia.org/wiki/Technical_virginity technical virginity], or as [http://en.wikipedia.org/wiki/Safe_sex safe sex]alternatives to anal sex,<sup class="reference" id="cite_ref-Johnson_and_Johnson_58-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Johnson_and_Johnson-58 [59]]</sup><sup class="reference" id="cite_ref-Underwood_59-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Underwood-59 [60]]</sup><sup class="reference" id="cite_ref-Perez_63-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Perez-63 [64]]</sup><sup class="reference" id="cite_ref-Virgin_64-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Virgin-64 [65]]</sup> while other frot advocates [http://en.wikipedia.org/wiki/Frot#Comparison_to_anal_sex_and_debates denounce anal sex] as degrading to the receptive partner and unnecessarily risky.<sup class="reference" id="cite_ref-Advocate.com_62-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Advocate.com-62 [63]]</sup><sup class="reference" id="cite_ref-Perez_63-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Perez-63 [64]]</sup><sup class="reference" id="cite_ref-gaytoday.badpuppy.com_65-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-gaytoday.badpuppy.com-65 [66]]</sup><sup class="reference" id="cite_ref-out.com_66-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-out.com-66 [67]]</sup></p>
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====Prevalence====
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The prevalence of anal sex among homosexual couples in the West has varied over time. Magnus Hirschfeld, in his 1914 work, ''The Homosexuality of Men and Women'', reported the rate of anal sex among homosexual men surveyed to be 8%, the least favored of all the practices documented.<sup class="reference" id="cite_ref-67" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-67 [68]]</sup> Likewise, some scholars state that oral sex and mutual masturbation are more common than anal stimulation among gay men in long-term relationships,<sup class="reference" id="cite_ref-Not_all_2-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Not_all-2 [3]]</sup><sup class="reference" id="cite_ref-Johnson_and_Johnson_58-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Johnson_and_Johnson-58 [59]]</sup> and that, in general, anal intercourse is more popular among homosexual male couples than among heterosexual couples, but that "it ranks behind oral sex and mutual masturbation" among both sexual orientations in prevalence.<sup class="reference" id="cite_ref-Weiten_68-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Weiten-68 [69]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">By the 1950s in the United Kingdom, it was thought that about fifteen percent of male homosexuals had anal sex.<sup class="reference" id="cite_ref-69" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-69 [70]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup> More recent studies, ''The Gay Urban Men's Study'' (P.I. Stall, UCSF) and the ''Young Men's Study'' (YMS, PI Osmond/Catania, UCSF), indicate that 50% of the surveyed men who have sex with men engage in anal sex.<sup class="reference" id="cite_ref-70" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-70 [71]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup><sup class="reference" id="cite_ref-71" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-71 [72]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup> The 1994 Laumann study suggests that 80% of gay men practice it and 20% never engage in it at all.<sup class="reference" id="cite_ref-72" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-72 [73]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The [http://en.wikipedia.org/wiki/National_Institutes_of_Health National Institutes of Health] (NIH), with information published in the ''[http://en.wikipedia.org/wiki/British_Medical_Journal British Medical Journal]'' (BMJ), states that two thirds of gay men have anal sex.<sup class="reference" id="cite_ref-Robin_Bell_3-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Robin_Bell-3 [4]]</sup> Other sources suggest that roughly three-fourths of gay men have anal sex at one time or another in their lives, with an equal percentage participating as tops and bottoms.<sup class="reference" id="cite_ref-Underwood_59-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Underwood-59 [60]]</sup> A survey in ''[http://en.wikipedia.org/wiki/The_Advocate The Advocate]'' in 1994 indicated that 46% of gay men preferred to penetrate their partners, while 43% preferred to be the receptive partner.<sup class="reference" id="cite_ref-Underwood_59-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Underwood-59 [60]]</sup> A survey conducted from 1994 to 1997 in San Francisco by the [http://en.wikipedia.org/wiki/Stop_AIDS_Project Stop AIDS Project] indicated that over the course of the study, among men who have sex with men, the proportion engaging in anal sex increased from 57.6% to 61.2%.<sup class="reference" id="cite_ref-cdc.gov-Rectal_73-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-cdc.gov-Rectal-73 [74]]</sup></p>
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====Pain====
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Pain during receptive anal sex is formally known as anodyspareunia.<sup class="reference" id="cite_ref-Heidelbaugh_11-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heidelbaugh-11 [12]]</sup> One study found that about 12% of gay men find it too painful to pursue, and concluded that the perception of anal sex as painful is just as likely to be psychologically or emotionally based as it is to be physically based.<sup class="reference" id="cite_ref-Ritter_Terndrup_74-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Ritter_Terndrup-74 [75]]</sup> Another study that examined pain during insertive and receptive anal sex in gay men found that 3% of tops (insertive partners) and 16% of bottoms (receptive partners) reported significant pain.<sup class="reference" id="cite_ref-Rosser_97_75-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Rosser_97-75 [76]]</sup> Factors predictive of pain during anal sex include inadequate [http://en.wikipedia.org/wiki/Personal_lubricant lubrication], feeling tense or anxious, lack of stimulation, as well as lack of social ease with being gay and being closeted. Research has found that psychological factors can in fact be the primary contributors to the experience of pain during anal intercourse and that adequate communication between sexual partners can prevent it, countering the notion that pain is always inevitable during anal sex.<sup class="reference" id="cite_ref-Heidelbaugh_11-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Heidelbaugh-11 [12]]</sup><sup class="reference" id="cite_ref-Ritter_Terndrup_74-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Ritter_Terndrup-74 [75]]</sup><sup class="reference" id="cite_ref-Rosser_97_75-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Rosser_97-75 [76]]</sup><sup class="reference" id="cite_ref-Rosser_05_76-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Rosser_05-76 [77]]</sup></p>
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===Female to female===
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[http://en.wikipedia.org/wiki/File:Wiki-analoral.png][http://en.wikipedia.org/wiki/File:Wiki-analoral.png]A woman performing [http://en.wikipedia.org/wiki/Anilingus anilingus] (anal–oral sex) on another woman.<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">There is less research on anal sexual activity among [http://en.wikipedia.org/wiki/Women_who_have_sex_with_women women who have sex with women] compared to couples of other sexual orientations, but stimulating the anus for sexual pleasure is stated to be a part of many lesbians' sex lives; the anus can be rimmed – the tongue moved around its edge – stroked or [http://en.wikipedia.org/wiki/Fingering_(sexual_act) penetrated with the fingers] or a [http://en.wikipedia.org/wiki/Dildo dildo].<sup class="reference" id="cite_ref-Newman_5-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Newman-5 [6]]</sup><sup class="reference" id="cite_ref-Loulan_77-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Loulan-77 [78]]</sup> There are lesbians who like anal sex and others "who cannot bear the thought of it."<sup class="reference" id="cite_ref-Harding_78-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Harding-78 [79]]</sup> In 1987, a non-scientific study (Munson) was conducted of more than 100 members of a lesbian social organization in Colorado. When asked what techniques and [http://en.wikipedia.org/wiki/Lesbian_sexual_practices lesbian sexual practices] they used in their last ten sexual encounters, 100% reported kissing, sucking on breasts, and manual stimulation of the clitoris; more than 90% reported French kissing, oral sex, and fingers inserted into the vagina; and 80% reported [http://en.wikipedia.org/wiki/Tribadism tribadism]. Lesbians in their 30s were twice as likely as other age groups to engage in anal stimulation (with a finger or dildo).<sup class="reference" id="cite_ref-Carroll_14-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Carroll-14 [15]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">While author Tom Boellstorff, when particularly examining anal sex among gay and lesbian individuals in [http://en.wikipedia.org/wiki/Indonesia Indonesia], stated that he has not heard of oral-anal contact or anal penetration as recognized forms of lesbian sexuality but assume they take place,<sup class="reference" id="cite_ref-Boellstorff_79-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Boellstorff-79 [80]]</sup> author [http://en.wikipedia.org/wiki/Felice_Newman Felice Newman] cites anal sex as a part of lesbian sexual practices in her book ''[http://en.wikipedia.org/wiki/The_Whole_Lesbian_Sex_Book:_A_Passionate_Guide_for_All_of_Us The Whole Lesbian Sex Book]''.<sup class="reference" id="cite_ref-Newman_5-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-Newman-5 [6]]</sup> Daniel Villarreal of [http://en.wikipedia.org/wiki/Queerty.com Queerty.com]suggests that lesbians are better equipped to "teach heterosexual women" about anal sex than gay men are. "Firstly, they're women and anal sex feels different for women. Women lack that Giggity-spot called the prostate, so anal-loving [lesbians] know much more how anal sex feels as a woman than gay men ever could," he stated. "Most importantly though, women respond better to women. Ladies can approach the issue by discussing trust, communication, sobriety, [http://en.wikipedia.org/wiki/Human_papillomavirus HPV]-prevention, and knowing your own body."<sup class="reference" id="cite_ref-queerty.com_80-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-queerty.com-80 [81]]</sup></p>
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==Health risks==
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Anal sex can expose participants to two principal dangers: infections due to the high number of infectious [http://en.wikipedia.org/wiki/Microorganisms microorganisms] not found elsewhere on the body, and physical damage to the anus and the rectum due to their fragility. Increased experimentation with anal sex by young persons without sound knowledge about risks and what safety measures do and don't work may be linked to an increase in sexually transmitted infections.<sup class="reference" id="cite_ref-81" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-81 [82]]</sup> Judy Kuriansky, a [http://en.wikipedia.org/wiki/Columbia_University Columbia University] professor and author, stated, "It really is shocking how many myths young people have about anal sex. They don't think you can get a disease from it because you're not having [vaginal] intercourse."<sup class="reference" id="cite_ref-82" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-82 [83]]</sup></p>
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===Infection===
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[http://en.wikipedia.org/wiki/File:Gray1082.png][http://en.wikipedia.org/wiki/File:Gray1082.png]Mucous membranes of the [http://en.wikipedia.org/wiki/Rectum rectum].<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Unprotected anal sex, colloquially known as "[http://en.wikipedia.org/wiki/Bareback_(sex) barebacking]",<sup class="reference" id="cite_ref-83" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-83 [84]]</sup> carries an elevated risk of passing on sexually transmitted diseases because the anal sphincter is delicate, easily-torn tissue; a tear can provide an entry for pathogens. The high concentration of [http://en.wikipedia.org/wiki/White_blood_cell white blood cells] around the rectum, together with the risk of tearing and the rectum's function to absorb fluid, places those who engage in unprotected anal sex at high risk of [http://en.wikipedia.org/wiki/Sexually_transmitted_infection sexually transmitted infection]. Use of [http://en.wikipedia.org/wiki/Condom condoms], ample lubrication to reduce the risk of tearing,<sup class="reference" id="cite_ref-dailyuw.com_30-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-dailyuw.com-30 [31]]</sup><sup class="reference" id="cite_ref-lubrication_31-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-lubrication-31 [32]]</sup> and other [http://en.wikipedia.org/wiki/Safer_sex safer sex] practices reduce the risk. However, a condom can break or come off during anal sex, so both sex partners must remain watchful during sex and there is still some risk if one or both partners carries a sexually-transmissible infection.<sup class="reference" id="cite_ref-84" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-84 [85]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Unprotected receptive anal sex is considered the sex act most likely to result in [http://en.wikipedia.org/wiki/HIV HIV] transmission.<sup class="reference" id="cite_ref-85" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-85 [86]]</sup><sup class="reference" id="cite_ref-86" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-86 [87]]</sup><sup class="reference" id="cite_ref-87" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-87 [88]]</sup><sup class="reference" id="cite_ref-88" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-88 [89]]</sup> Other infections that can be transmitted by unprotected anal sex are [http://en.wikipedia.org/wiki/Human_papilloma_virus human papilloma virus (HPV)] (which can increase risk for [http://en.wikipedia.org/wiki/Anal_cancer anal cancer]<sup class="reference" id="cite_ref-89" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-89 [90]]</sup> and [http://en.wikipedia.org/wiki/Typhoid_fever typhoid fever]),<sup class="reference" id="cite_ref-90" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-90 [91]]</sup> [http://en.wikipedia.org/wiki/Amoebiasis amoebiasis]; [http://en.wikipedia.org/wiki/Chlamydia_infection chlamydia]; [http://en.wikipedia.org/wiki/Cryptosporidiosis cryptosporidiosis]; [http://en.wikipedia.org/wiki/Escherichia_coli E. coli infections]; [http://en.wikipedia.org/wiki/Giardiasis giardiasis]; [http://en.wikipedia.org/wiki/Gonorrhea gonorrhea]; [http://en.wikipedia.org/wiki/Hepatitis_A hepatitis A]; [http://en.wikipedia.org/wiki/Hepatitis_B hepatitis B]; [http://en.wikipedia.org/wiki/Hepatitis_C hepatitis C]; [http://en.wikipedia.org/wiki/Herpes_simplex herpes simplex]; [http://en.wikipedia.org/wiki/Kaposi%27s_sarcoma-associated_herpesvirus Kaposi's sarcoma-associated herpesvirus] (HHV-8);<sup class="reference" id="cite_ref-91" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-91 [92]]</sup> [http://en.wikipedia.org/wiki/Lymphogranuloma_venereum lymphogranuloma venereum]; [http://en.wikipedia.org/wiki/Mycoplasma_hominis Mycoplasma hominis]; [http://en.wikipedia.org/wiki/Mycoplasma_genitalium Mycoplasma genitalium]; [http://en.wikipedia.org/wiki/Pubic_lice pubic lice]; [http://en.wikipedia.org/wiki/Salmonellosis salmonellosis]; [http://en.wikipedia.org/wiki/Shigella shigella]; [http://en.wikipedia.org/wiki/Syphilis syphilis]; [http://en.wikipedia.org/wiki/Tuberculosis tuberculosis]; and[http://en.wikipedia.org/wiki/Ureaplasma_urealyticum Ureaplasma urealyticum].<sup class="reference" id="cite_ref-AnalHealth_15-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-AnalHealth-15 [16]]</sup><sup class="reference" id="cite_ref-92" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-92 [93]]</sup><sup class="reference" id="cite_ref-93" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-93 [94]]</sup><sup class="reference" id="cite_ref-STDchina_94-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-STDchina-94 [95]]</sup></p>
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===Cancer===
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Anal cancer is relatively rare, accounting for about 1 percent of gastrointestinal malignancies, but as many as 4,000 new cases can be diagnosed within a year in the United States, according to the[http://en.wikipedia.org/wiki/American_Cancer_Society American Cancer Society].<sup class="reference" id="cite_ref-cancer.org_95-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-cancer.org-95 [96]]</sup><sup class="reference" id="cite_ref-www.fhcrc.org_96-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-www.fhcrc.org-96 [97]]</sup> Most cases of anal cancer are related to infection with the [http://en.wikipedia.org/wiki/Human_papilloma_virus human papilloma virus] (HPV).<sup class="reference" id="cite_ref-cancer.org_95-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-cancer.org-95 [96]]</sup><sup class="reference" id="cite_ref-www.fhcrc.org_96-1" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-www.fhcrc.org-96 [97]]</sup> Anal sex alone does not cause anal cancer; the risk of anal cancer through anal sex is attributed to HPV infection, which is often contracted through unprotected anal sex. The incidence of the disease has jumped 160% in men and 78% in women in the last thirty years, according to a 2004 American study. The increase is attributed to changing trends in sexual behavior (such as a history of multiple sex partners, fifteen or more, or receptive anal sex) and smoking. If a current smoker, there is a fourfold increase in risk, though independent of other behavioral risk factors, such as sexual activity. Receptive anal sex increases the incidence sevenfold.<sup class="reference" id="cite_ref-www.fhcrc.org_96-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-www.fhcrc.org-96 [97]]</sup> Among the female control group studied, 21.5 percent had reported practicing anal sex, a significant increase from a previous case-control study by [http://en.wikipedia.org/wiki/Epidemiology epidemiologist] Janet Daling (PhD, member of [http://en.wikipedia.org/wiki/Fred_Hutchinson_Cancer_Research_Center Fred Hutchinson's Public Health Sciences Division]) and her colleagues, published in 1987, in which 11 percent of female controls had reported ever having anal sex. This and other studies also indicate that gay or bisexual sex among men is on the rise, which may account for the increase in anal cancer.<sup class="reference" id="cite_ref-www.fhcrc.org_96-3" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-www.fhcrc.org-96 [97]]</sup> "The sharpest increase was among African American men, whose incidence of anal cancer has more than doubled in the past three decades. Black men also had a lower survival rate from the disease." The study reported that the five-year survival rate for black men with early stage disease was 62 percent as compared to 79 percent for white men with localized cancer. However, the survey also reported that black men were more likely than white men to report having had intercourse with another male in the last year. Regarding all the increases, whether or not sexual practices have changed, Daling, concluded, "[I]t also could be that people are just more likely to discuss their sexual behavior these days."<sup class="reference" id="cite_ref-www.fhcrc.org_96-4" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-www.fhcrc.org-96 [97]]</sup></p>
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===Physical damage===
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Physical damage to the rectum and anus can manifest as generalized ano-rectal trauma, [http://en.wikipedia.org/wiki/Anal_fissure anal fissures],<sup class="reference" id="cite_ref-AnalHealth_15-2" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-AnalHealth-15 [16]]</sup> [http://en.wikipedia.org/wiki/Rectal_prolapse rectal prolapse], and exacerbating [http://en.wikipedia.org/wiki/Hemorrhoid hemorrhoids].<sup class="reference" id="cite_ref-pedclerk_97-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-pedclerk-97 [98]]</sup> Adequate lubrication and preparation reduces the risk of physical trauma,<sup class="reference" id="cite_ref-98" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-98 [99]]</sup> while the risk increases with use of alcohol or other drugs that dull sensitivity.</p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Loss of bowel control is not a highly likely result of anal sex, but may be caused by repeated injury or the insertion of large objects.<sup class="reference" id="cite_ref-99" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-99 [100]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup><sup class="reference" id="cite_ref-100" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-100 [101]]</sup> [http://en.wikipedia.org/wiki/Kegel_exercises Kegel exercises] have been recommended to maintain muscle tone by a speaker at the[http://en.wikipedia.org/wiki/Society_for_the_Scientific_Study_of_Sexuality Society for the Scientific Study of Sexuality] and the American Association of Sex Educators, who noted he had never personally observed "loosening" in any of his patients.<sup class="reference" id="cite_ref-101" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-101 [102]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">A 1993 study published in the ''[http://en.wikipedia.org/wiki/Journal_of_the_Royal_Society_of_Medicine Journal of the Royal Society of Medicine]'' found that fourteen out of a sample of forty men receiving anal intercourse experienced episodes of frequent anal incontinence.<sup class="reference" id="cite_ref-102" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-102 [103]]</sup> However, a 1997 study published in the''American Journal of Gastroenterology'' found no difference in levels of incontinence between homosexual men who engaged in anal sex and heterosexual men who did not, and criticized the earlier study for its inclusion of [http://en.wikipedia.org/wiki/Flatulence flatulence] in its definition of incontinence.<sup class="reference" id="cite_ref-103" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-103 [104]]</sup></p>
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==Cultural issues==
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[http://en.wikipedia.org/wiki/File:Suzuki_Harunobu_Shunga.jpg][http://en.wikipedia.org/wiki/File:Suzuki_Harunobu_Shunga.jpg][http://en.wikipedia.org/wiki/Suzuki_Harunobu Suzuki Harunobu], A [http://en.wikipedia.org/wiki/Shunga shunga] print depicting an older and a younger man<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Historically, a number of cultures have recorded the practice of anal intercourse between men.</p>
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===Ancient and non-Western cultures===
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The term "[http://en.wikipedia.org/wiki/Greek_love Greek love]" has long been used to refer to the practice, and in modern times, "doing it the Greek way" is sometimes used as slang for anal sex. However, homosexual anal sex was far from a universally accepted practice in [http://en.wikipedia.org/wiki/Ancient_Greece Ancient Greece]. It was the target of jokes in surviving comedies; [http://en.wikipedia.org/wiki/Aristophanes Aristophanes] mockingly alludes to the practice, claiming that "Most citizens are europroktoi (wide-arsed) now."<sup class="reference" id="cite_ref-104" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-104 [105]]</sup> While [http://en.wikipedia.org/wiki/Pederasty_in_ancient_Greece pedagogic pederasty] was an essential element in the education of male youths, these relationships, at least in Athens and Sparta, were expected to steer clear of penetrative sex of any kind. There are very few works of pottery or other art that display anal sex between older men and boys, let alone with adult men. Most such works depict fondling or [http://en.wikipedia.org/wiki/Intercrural_sex intercrural sex], which was not condemned for violating and feminizing the boys. Other sources make it clear that the practice was criticized as shameful,<sup class="reference" id="cite_ref-105" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-105 [106]]</sup> and seen as a form of [http://en.wikipedia.org/wiki/Hubris hubris].<sup class="reference" id="cite_ref-106" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-106 [107]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup></p>
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[http://en.wikipedia.org/wiki/File:Warren_Cup_BM_GR_1999.4-26.1_n1.jpg][http://en.wikipedia.org/wiki/File:Warren_Cup_BM_GR_1999.4-26.1_n1.jpg]Two [http://en.wikipedia.org/wiki/Ancient_Rome Roman] males on the [http://en.wikipedia.org/wiki/Warren_Cup Warren Cup], British Museum<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In later [http://en.wikipedia.org/wiki/Greek_literature#Roman_Age Roman-era Greek poetry], anal sex became a common topos, represented as taking place with "eligible" youths: those who had attained the proper age but had not yet become adults. Seducing children into the practice was considered very shameful for the adult, and having such relations with a male who was no longer adolescent was considered more shameful for the young male than for the one mounting him. Greek courtesans, or [http://en.wikipedia.org/wiki/Hetaera hetaerae], are said to have frequently practiced heterosexual anal intercourse as a means of preventing pregnancy.<sup class="reference" id="cite_ref-107" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-107 [108]]</sup> The acceptability of anal sex thus varied with the time-period and the location, as Ancient Greece spanned a long time and stretched over three continents and two major seas.</p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">For a male citizen to take the passive (or receptive) role in anal intercourse was condemned in Rome as an act of ''impudicitia'' (immodesty or unchastity). Free men, however, frequently took the active role with a young slave, known as a ''[http://en.wikipedia.org/wiki/Catamite catamite]'' or ''puer delicatus.'' In fact the Romans thought of anal sex as something specifically "Greek," although Roman men often availed themselves of their own slaves or others in this way.<sup class="reference" id="cite_ref-108" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-108 [109]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In Japan, records (including detailed [http://en.wikipedia.org/wiki/Shunga shunga]) show that at least some men in relationships with other men did engage in penetrative anal intercourse.</p>
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[http://en.wikipedia.org/wiki/File:Larcomuseumanalsex.jpg][http://en.wikipedia.org/wiki/File:Larcomuseumanalsex.jpg]Man and woman having anal sex. Ceramic, [http://en.wikipedia.org/wiki/Moche Moche] Culture. 300 C.E. [http://en.wikipedia.org/wiki/Larco_Museum Larco Museum] Collection<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">Evidence suggestive of widespread heterosexual anal intercourse in a pre-modern culture can be found in the erotic vases, or stirrup-spout pots, made by the[http://en.wikipedia.org/wiki/Moche Moche] people of Peru; in a survey<sup class="reference" id="cite_ref-109" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-109 [110]]</sup> of a collection of these pots, it was found that 31 percent of them depicted heterosexual anal intercourse, more by far than any other sex act. Moche pottery of this type belonged to the world of the dead, which was believed to be a reversal of life. Thus the reverse of common practices was often portrayed. The [http://en.wikipedia.org/wiki/Larco_Museum Larco Museum] houses an erotic gallery in which this pottery is showcased.<sup class="reference" id="cite_ref-110" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-110 [111]]</sup></p>
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The 19th century anthropologist [http://en.wikipedia.org/wiki/Richard_Francis_Burton Richard Francis Burton] theorized that there is a geographical [http://en.wikipedia.org/wiki/Sotadic_zone Sotadic zone] wherein penetrative intercourse between men is particularly prevalent and accepted; moreover he was one of the first writers to advance the premise that such an orientation is biologically determined.<sup class="reference" id="cite_ref-burton1885_111-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-burton1885-111 [112]]</sup></p>
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===Western cultures===
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In many Western countries, anal sex has generally been [http://en.wikipedia.org/wiki/Taboo taboo] since the [http://en.wikipedia.org/wiki/Middle_Ages Middle Ages]<sup class="reference" id="cite_ref-112" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-112 [113]]</sup> when [http://en.wikipedia.org/wiki/Christian_heresy heretical] movements were sometimes attacked by accusations that their members practised anal sex among themselves.<sup class="Template-Fact" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citation_needed citation needed]'']</sup> At that time the mainstream Christian clergy was not celibate, but the highest orders of some heretical sects were, leading to rumours that their celibacy was a sign of their attraction to members of the same sex.<sup class="Template-Fact" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citation_needed citation needed]'']</sup> The term ''[http://en.wikipedia.org/wiki/Buggery buggery]'' originated in [http://en.wikipedia.org/wiki/Medieval medieval] Europe as an insult used to describe the rumoured same-sex sexual practices of the heretics from a sect originating in [http://en.wikipedia.org/wiki/Bulgaria Bulgaria], where its followers were called ''[http://en.wikipedia.org/wiki/Bogomil bogomils]''<sup class="Template-Fact" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citation_needed citation needed]'']</sup>; when they spread out of the country they were called ''buggres'' (from the [http://en.wikipedia.org/wiki/Ethnonym ethnonym] ''Bulgars'').<sup class="Template-Fact" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citation_needed citation needed]'']</sup> Another term for the practice, more archaic, is "pedicate" from the [http://en.wikipedia.org/wiki/Latin_language Latin] ''pedicare,'' with the same meaning.<sup class="reference" id="cite_ref-113" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-113 [114]]</sup></p>
  +
  +
<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The Renaissance poet [http://en.wikipedia.org/wiki/Pietro_Aretino Pietro Aretino] advocated the practice in his ''Sonetti Lussuriosi'' (Lust Sonnets).<sup class="reference" id="cite_ref-114" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-114 [115]]</sup></p>
  +
  +
<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">While men who engaged in homosexual relationships were generally suspected of engaging in anal sex, many such individuals did not. Among these, in recent times, have been [http://en.wikipedia.org/wiki/Andr%C3%A9_Gide André Gide], who found it repulsive;<sup class="reference" id="cite_ref-115" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-115 [116]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup> and [http://en.wikipedia.org/wiki/No%C3%ABl_Coward Noël Coward], who had a horror of disease, and asserted when young that "I'd never do anything – well the disgusting thing they do – because I know I could get something wrong with me."<sup class="reference" id="cite_ref-116" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-116 [117]]</sup><sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Citation_style Full citation needed]'']</sup></p>
  +
===In religion===
  +
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| class="mbox-image" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;padding-top:2px;padding-right:0px;padding-bottom:2px;padding-left:0.5em;text-align:center;"|
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| class="mbox-text" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;padding-top:0.25em;padding-right:0.5em;padding-bottom:0.25em;padding-left:0.5em;width:1065px;"|This section '''needs additional [http://en.wikipedia.org/wiki/Wikipedia:Citing_sources#Inline_citations citations] for [http://en.wikipedia.org/wiki/Wikipedia:Verifiability verification]'''. Please help [http://en.wikipedia.org/w/index.php?title=Anal_sex&action=edit improve this article] by adding citations to [http://en.wikipedia.org/wiki/Wikipedia:Identifying_reliable_sources reliable sources]. Unsourced material may be [http://en.wikipedia.org/wiki/Template:Citation_needed challenged] and [http://en.wikipedia.org/wiki/Wikipedia:Verifiability#Burden_of_evidence removed].''(March 2011)''
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|}
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[http://en.wikipedia.org/wiki/File:Sodoma_-_Elluin.jpg][http://en.wikipedia.org/wiki/File:Sodoma_-_Elluin.jpg][http://en.wikipedia.org/w/index.php?title=Fran%C3%A7ois-Rolland_Elluin&action=edit&redlink=1 François-Rolland Elluin],''Sodomites provoking divine wrath'', from ''Le pot-pourri'' (1781)Further information: [http://en.wikipedia.org/wiki/Sodomy Sodomy]====Judaism====
  +
<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The [http://en.wikipedia.org/wiki/Mishneh_Torah Mishneh Torah], a text considered authoritative by [http://en.wikipedia.org/wiki/Orthodox_Judaism Orthodox Jewish] sects,<sup class="reference" id="cite_ref-117" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-117 [118]]</sup> states “since a man’s wife is permitted to him, he may act with her in any manner whatsoever. He may have intercourse with her whenever he so desires and kiss any organ of her body he wishes, and he may have intercourse with her naturally or unnaturally [traditionally, this refers to anal and oral sex], provided that he does not expend semen to no purpose. Nevertheless, it is an attribute of piety that a man should not act in this matter with levity and that he should sanctify himself at the time of intercourse.”<sup class="reference" id="cite_ref-118" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-118 [119]]</sup></p>
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====Christianity====
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{| class="metadata plainlinks ambox mbox-small-left ambox-content ambox-Unreferenced" style="font-size:11px;margin-top:4px;margin-right:1em;margin-bottom:4px;margin-left:0px;border-top-width:1px;border-right-width:1px;border-bottom-width:1px;border-top-style:solid;border-right-style:solid;border-bottom-style:solid;border-top-color:rgb(170,170,170);border-right-color:rgb(170,170,170);border-bottom-color:rgb(170,170,170);border-left-width:10px;border-left-style:solid;border-left-color:rgb(242,133,0);background-image:initial;background-attachment:initial;background-origin:initial;background-clip:initial;width:238px;border-collapse:collapse;line-height:1.25em;background-position:initialinitial;background-repeat:initialinitial;"
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| class="mbox-image" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;padding-top:2px;padding-right:0px;padding-bottom:2px;padding-left:0.5em;text-align:center;"|[http://en.wikipedia.org/wiki/File:Question_book-new.svg]
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| class="mbox-text" style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none;border-width:initial;padding-top:0.25em;padding-right:0.5em;padding-bottom:0.25em;padding-left:0.5em;width:162px;"|This unreferenced section requires [http://en.wikipedia.org/wiki/Wikipedia:Citing_sources citations] to ensure[http://en.wikipedia.org/wiki/Wikipedia:Verifiability verifiability].
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|}
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<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">In Christian countries,<sup class="noprint Inline-Template" style="line-height:1em;white-space:nowrap;">[''[http://en.wikipedia.org/wiki/Wikipedia:Please_clarify clarification needed]'']</sup> anal sex is sometimes referred to euphemistically as the ''peccatum contra naturam'' (the sin against nature, after [http://en.wikipedia.org/wiki/Thomas_Aquinas Thomas Aquinas]) or ''Sodomitica luxuria'' (sodomitical lusts, in one of Charlemagne's ordinances), or ''peccatum illud horribile, inter christianos non nominandum'' (that horrible sin that among Christians is not to be named).</p>
  +
====Islam====
  +
Main article: [http://en.wikipedia.org/wiki/Islamic_views_on_anal_sex Islamic views on anal sex]<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">''Liwat,'' or the sin of Lot's people, is officially prohibited by most Islamic sects. There are parts of the Qur'an which talk about smiting on [http://en.wikipedia.org/wiki/Sodom_and_Gomorrah Sodom and Gomorrah], and this is thought to be a reference to unnatural sex, and so there are [http://en.wikipedia.org/wiki/Hadith hadith] and Islamic laws which prohibit it. Same sex male practitioners of anal relations are called ''luti'' or ''lutiyin'' in plural and are seen as criminals in the same way that a thief is a criminal, meaning that they are giving in to a universal temptation.</p>
  +
====Buddhism====
  +
Further information: [http://en.wikipedia.org/wiki/Sexuality_and_Buddhism Sexuality and Buddhism] and [http://en.wikipedia.org/wiki/LGBT_topics_and_Buddhism LGBT topics and Buddhism]<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">The most common formulation of Buddhist ethics is the [http://en.wikipedia.org/wiki/The_Five_Precepts Five Precepts]. These precepts take the form of voluntary, personal undertakings, not divine mandate or instruction. The third of the Precepts is "To refrain from committing [http://en.wikipedia.org/wiki/Sexual_misconduct sexual misconduct]."<sup class="reference" id="cite_ref-HIGG_119-0" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-HIGG-119 [120]]</sup> However, "sexual misconduct" ([http://en.wikipedia.org/wiki/Sanskrit Sanskrit]: ''Kāmesu micchācāra'' literally "sense gratifications arising from the 5 senses"") is subject to interpretation relative to the social norms of the followers.<sup class="reference" id="cite_ref-120" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-120 [121]]</sup> In fact, Buddhism, in its fundamental form, does not define what is right and what is wrong in absolute terms for [http://en.wikipedia.org/wiki/Laity lay followers]. Therefore the interpretation of what kinds of sexual activity are acceptable for a [http://en.wikipedia.org/wiki/Layman layman] is not a religious matter as far as Buddhism is concerned.<sup class="reference" id="cite_ref-121" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-121 [122]]</sup></p>
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  +
<p style="margin-top:0.4em;margin-right:0px;margin-bottom:0.5em;margin-left:0px;line-height:1.5em;">[http://en.wikipedia.org/wiki/Buddhism Buddhism] teaches that sensual enjoyment and desire in general, and sexual pleasure in particular, are hindrances to [http://en.wikipedia.org/wiki/Bodhi enlightenment].<sup class="reference" id="cite_ref-122" style="line-height:1em;font-weight:normal;">[http://en.wikipedia.org/wiki/Anal_sex#cite_note-122 [123]]</sup> Buddhist [http://en.wikipedia.org/wiki/Monk monks] and [http://en.wikipedia.org/wiki/Nun nuns] of most traditions are expected to refrain from all sexual activity and take [http://en.wikipedia.org/wiki/Vows_of_celibacy vows of celibacy]; lay people, however, are not expected to refrain from any specific form of sexual activity, and there is no concept of sinfulness attached to sex.</p>
  +
====Hinduism====
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See also: [http://en.wikipedia.org/wiki/History_of_sex_in_India History of sex in India] and [http://en.wikipedia.org/wiki/LGBT_topics_and_Hinduism LGBT topics and Hinduism]

Revision as of 04:01, 4 June 2012

Fuck therians!!!!!!!!!!!!

Anal sex (also called anal intercourse) is the sex act in which the penis is inserted into the anus of a sexual partner.[1][2] The term can also include other sexual acts involving the anus, including pegging,anilingus, fingering, and object insertion.[1][2]

While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual relationships.[1][3][4][5] Types of anal sex can also be a part of lesbian sexual practices.[6]

Many people find anal sex pleasurable, and some may reach orgasm — through stimulation of the prostate in men, and clitoral and G-Spot leg stimulation in women.[7][8][9][10] However, many people find it painful as well, sometimes extremely so,[11][12] which may be psychosomatic in some cases.[12] As with most forms of sexual interaction, individuals are at risk for contracting sexually transmitted diseases,[13][14] and therefore safe-sex practices are advised.[13] Anal sex is considered a high-risk sexual practice, and unprotected anal sex is the riskiest of all forms of sexual intercourse,[1] due to the vulnerability of the rectum and sphincter tissues.[1][2] It generally requires a generous application of a personal lubricant to prevent tearing, since the anus does not have sufficient natural lubrication.[1][15]Anatomy and stimulation

See also: Prostate massage[1][2]Male genital anatomy, showing the location of the prostate with respect to the rectum

The abundance of nerve endings in the anal region and rectum makes anal sex pleasurable for many men and women.[16] "The opening and closing of the anus is controlled by the internal and external sphincter muscles (the most important muscles when engaging in anal sex). The sphincter muscle is a sensitive membrane with many nerve endings and thus the source of pleasure or pain."[17]

In a male receiving partner, being penetrated can produce a pleasurable sensation due to the inserted penis rubbing or brushing against the prostate (also known as the "male G-Spot", "P-Spot" or "A-Spot") through the anal wall.[7][18] This can result in pleasurable sensations and can lead to an orgasm in some cases.[7][8] "For some men, prostate stimulation produces an orgasm that they describe as 'deeper,' more global and intense, longer-lasting, and associated with greater feelings of ecstasy than orgasm elicited by penile stimulation only."[8] The prostate is located next to the rectum and is the larger, more developed[19] male homologue to the Skene's glands (which are believed to be connected to the female G-Spot).[20]

Research shows that most women (70–80%) achieve orgasm only through direct clitoral stimulation.[21][22][23][24] The clitoris surrounds the vagina somewhat like a horseshoe and its tip or glans alone has more than 8,000 sensory nerve endings, more than any other part of the human body.[25] In addition to nerve endings present within the anus and rectum, women may find anal stimulation pleasurable due to the "legs" of the clitoris which extend along the vaginal lips back to the anus.[26] The Gräfenberg spot, or G-Spot – a small area behind the female pubic bone surrounding the urethra and accessible through the anterior wall of the vagina – is considered to have legs in relation to the clitoris.[8][27][28] Besides their accessibility, orgasm by stimulation of the clitoris or G-Spot through anal penetration is made possible because a thin membrane is all that separates the vaginal cavity from the rectal cavity, allowing for indirect stimulation.[6][8][9][10] Only a small percentage of women are able to orgasm from this type of stimulation alone.[10] Direct stimulation of the clitoris, G-Spot, or both, during anal sex can help some women to enjoy the experience and reach orgasm.[29]

In pornography, anal sex is often presented as routine and painless, but according to Go Ask Alice! and other researchers, anal sex occurs "much less frequently" than other sexual behaviors and can be painful if not performed with care.[1][3] The increase of anal activity among heterosexuals has been linked to the increase in anal pornography,[1] and the association with dominance and taboo make anal sex appealing to people of all sexual orientations.[30][31] Moreover, the opening of the anus (its sphincter) is usually tighter than a vagina, which can yield greater tactile pleasure for the man via his penis.[9][30]

While each person's sphincter muscles react to penetration differently, the anal sphincter in general has delicate tissue that can tear, and the rectal mucous membrane provides insufficient lubrication for sexual penetration. Researchers say adequate lubrication, relaxation, and communication between sexual partners are crucial to avoid pain or damage to the anus.[1][12][15][32] Ensuring that the anal area is clean and the bowel is empty (for both aesthetics and practicality) is also advised.[1]

Heterosexual

Male to female

[3][4]1892 lithograph by Paul Avril depicting male-to-female anal sex

Some men may enjoy being the insertive partner in anal sex because the anal sphincter is usually tighter than a vagina, which can yield greater tactile pleasure for the man via his penis.[9][30] The attitude of women towards being the receptive partner in this practice is diverse: while some consider it painful or uncomfortable, others find it pleasurable and some even prefer it to vaginal intercourse.[9][33] Unlike the clitoris or anus, the vaginal walls "contain relatively few nerve endings, making intense sexual stimulation, pleasure, and orgasm from vaginal-only penetration unlikely" and "it's generally only the lower third of the vagina that has enough nerve endings to feel any stimulation at all from a penis, finger, toy, or other penetrative object".[34] Vaginal intercourse may, however, promote a satisfying feeling of fullness or closeness with a sexual partner.[35]

In a study of heterosexual anal sex – (8/2010 (n=214)) – female participants stated that stimulation to multiple erogenous zones simultaneously (the clitoris, the G-Spot, the anus, or other erogenous zones) enabled them to enjoy anal intercourse with much less discomfort compared to anal penetration by itself. When accompanied by one or more of the other stimuli, women were able to orgasm and those who did reported that an orgasm during anal sex is more of a full-body experience than an orgasm from clitoral stimulation alone.[29]

Anal sex is held to carry a very low risk of unwanted pregnancy when not accompanied with vaginal intercourse, as anal intercourse cannot lead to pregnancy unless sperm is somehow transported to the vaginal opening in the process; in some populations, this activity is frequently used as a means of contraception, often in the absence of a condom.[36]

The risk to the woman is greater than the risk to the man during male-to-female anal intercourse.[37] The risk of injury to the receptive partner due to anal intercourse is many times higher than that due to vaginal sex,[38] and the risk for transmission of HIV is higher for anal sex than for vaginal sex.[39] Experts caution couples engaging in this practice to use protection, such as condoms, to stop the transmission of STDs.[1] Additionally, the man should never move from anal sex immediately to vaginal sex while barebacking or without changing the condom, due to infections that can arise in the vagina by bacteria present within the anus; this also applies to the use of sex toys.[26][40][41]

Female virginity

Male-to-female anal sex is often viewed as preserving female virginity because it is non-procreative and leaves the hymen intact. Among sexually active heterosexuals, the concept of "technical virginity", which includes oral sex and mutual masturbation, is conceived as resting solely on penile-vaginal penetration.[42][43][44][45] Since the early 1990s, "technical virginity" has been popular among U.S. teenagers (also see saddlebacking).[44][45]

Prevalence

In 1992, a study conducted by the U.S. Centers for Disease Control and Prevention found that only 26% of men 18 to 59 and 20% of women 18 to 59 had engaged in heterosexual anal sex; a similar 2005 survey (also conducted by the U.S. Centers for Disease Control and Prevention) found a rising incidence of anal sex relations in the American heterosexual population. The survey showed that 40% of men and 35% of women between 25 and 44 had engaged in heterosexual anal sex.[46] In terms of overall numbers of survey respondents, seven times as many women as gay men said that they engaged in anal intercourse, with this figure reflecting the larger heterosexual population size.[47] According to a study from the National Survey of Sexual Health and Behavior (NSSHB) that was authored by Dr. Debby Herbenick and other researchers, although anal intercourse is reported by fewer women than other partnered sex behaviors, partnered women in the age groups between 18–49 are significantly more likely to report having anal sex in the past 90 days.[48] As of 2011, this survey provides the most up to date data about anal sex at the population level.

In a 2007 report entitled Prevalence and Correlates of Heterosexual Anal and Oral Sex in Adolescents and Adults in the United States, published in the Journal of Infectious Disease, a national survey of Family Growth found that 34% men and 30% women reported ever participating in heterosexual anal sex. The percentage of participants reporting heterosexual anal sex was significantly higher among 20- to 24-year-olds and peaked among 30- to 34-year-olds.[49][50] Another survey in, 2008, focused on a much younger demographic of teenagers and young adults, aged 15–21. It found that 16% of 1350 surveyed had had this type of sex in the previous 3 months, with condoms being used 29% of the time.[51] However, given the subject matter, the survey hypothesized the prevalence was probably underestimated.

In 2009, Kimberly R. McBride published a clinical report in The Journal of Sex Research which stated that changing norms may affect the frequency of heterosexual anal sex behaviors and suggests that there is a role for the exotic in the sexual repertoires of some heterosexuals" "[F]or a certain number of heterosexuals, anal intercourse is pleasurable, exciting, and perhaps considered more intimate than vaginal sex...". McBride and her colleagues investigated the prevalence of non-intercourse anal sex behaviors among a sample of men (n=1,299) and women (n=1,919) compared to anal intercourse experience and found that 51% of men and 43% of women had participated in at least one act of oral–anal sex, manual–anal sex, or anal sex toy use.[49][52] McBride and Janssen found that the majority of men (n=631) and women (n=856) who reported heterosexual anal intercourse in the past 12 months were in exclusive, monogamous relationships: 69% and 73%, respectively.[49][52]

Figures for prevalence can vary amongst different demographics, regions, and nationalities. A 2001 French survey of five hundred female respondents concluded that a total of 29% had engaged in this practice, with one third of these confirming to have enjoyed the experience.[53] In contrast, in a 1999 South Korean survey of 586 women, 3.5% of respondents reported having had this type of sex.[54]

Figures for the prevalence of sexual behavior can also fluctuate over time. Edward O. Laumann's 1992 survey, reported in The Social Organization of Sexuality: Sexual Practices in the United States, found that about 20% of heterosexuals had engaged in male-to-female anal sex. Sex researcher Alfred Kinsey, working in the 1940s, had found that number to be closer to 40% at the time. More recently, a researcher from the University of British Columbia in 2005 put the number of heterosexuals who have engaged in this practice at between 30% and 50%.[55] According to Columbia University's health website Go Ask Alice!: "Studies indicate that about 25 percent of heterosexual couples have had anal sex at least once, and 10 percent regularly have anal penetration."[3]

Female to male (pegging)

[5][6]A woman wearing a strap-on dildo about to engage in anal sex with a man.See also: Pegging (sexual practice)

Pegging is a sexual practice in which a woman penetrates a man's anus with a strap-on dildo.[56] Advice columnist Dan Savage wrote that he believes all men should try pegging at least once, as it may introduce them to a new enjoyable sexual activity and illuminate them to the receiver's perspective in sex.[57] A few instructional movies and books have emerged in recent years, including Bend Over Boyfriend, produced by Fatale Media, Inc., and directed by Shar Rednour, SIR Video co-founder. As an accomplished author of numerous sex guides and informational books on various sexual taboos,Violet Blue wrote and released The Adventurous Couple's Guide to Strap-On Sex in 2007.[58]

The National Institutes of Health (NIH), with information published in the British Medical Journal (BMJ), states that, "There are little published data on how many heterosexual men would like their anus to be sexually stimulated in a heterosexual relationship," but that, "Anecdotally, it is a substantial number. What data we do have almost all relate to penetrative sexual acts, and the superficial contact of the anal ring with fingers or the tongue is even less well documented but may be assumed to be a common sexual activity for men of all sexual orientations."[4]

Homosexual

Male to male

[7][8]19th-century erotic interpretation ofHadrian and Antinous, by Paul Avril

Historically, anal sex has been commonly associated with male homosexuality. However, many men who have sex with men do not engage in anal sex.[1][3][59][60] Among men who have anal sex with other men, the insertive partner is called the top and the one being penetrated is called the bottom. Those who enjoy either role are referred to as versatile.[60][61][62] Gay men who prefer anal sex may view it as "[their] version of intercourse"[31] and as "the natural apex of sex, a wonderful expression of intimacy, and a great source of pleasure".[59] Psychologist Walt Odets said, "I think that anal sex has for gay men the same emotional significance that vaginal sex has for heterosexuals."[63]

Some men who have sex with men prefer to engage in frot or other forms of mutual masturbation because they find it more pleasurable or more affectionate, to preserve technical virginity, or as safe sexalternatives to anal sex,[59][60][64][65] while other frot advocates denounce anal sex as degrading to the receptive partner and unnecessarily risky.[63][64][66][67]

Prevalence

The prevalence of anal sex among homosexual couples in the West has varied over time. Magnus Hirschfeld, in his 1914 work, The Homosexuality of Men and Women, reported the rate of anal sex among homosexual men surveyed to be 8%, the least favored of all the practices documented.[68] Likewise, some scholars state that oral sex and mutual masturbation are more common than anal stimulation among gay men in long-term relationships,[3][59] and that, in general, anal intercourse is more popular among homosexual male couples than among heterosexual couples, but that "it ranks behind oral sex and mutual masturbation" among both sexual orientations in prevalence.[69]

By the 1950s in the United Kingdom, it was thought that about fifteen percent of male homosexuals had anal sex.[70][Full citation needed] More recent studies, The Gay Urban Men's Study (P.I. Stall, UCSF) and the Young Men's Study (YMS, PI Osmond/Catania, UCSF), indicate that 50% of the surveyed men who have sex with men engage in anal sex.[71][Full citation needed][72][Full citation needed] The 1994 Laumann study suggests that 80% of gay men practice it and 20% never engage in it at all.[73]

The National Institutes of Health (NIH), with information published in the British Medical Journal (BMJ), states that two thirds of gay men have anal sex.[4] Other sources suggest that roughly three-fourths of gay men have anal sex at one time or another in their lives, with an equal percentage participating as tops and bottoms.[60] A survey in The Advocate in 1994 indicated that 46% of gay men preferred to penetrate their partners, while 43% preferred to be the receptive partner.[60] A survey conducted from 1994 to 1997 in San Francisco by the Stop AIDS Project indicated that over the course of the study, among men who have sex with men, the proportion engaging in anal sex increased from 57.6% to 61.2%.[74]

Pain

Pain during receptive anal sex is formally known as anodyspareunia.[12] One study found that about 12% of gay men find it too painful to pursue, and concluded that the perception of anal sex as painful is just as likely to be psychologically or emotionally based as it is to be physically based.[75] Another study that examined pain during insertive and receptive anal sex in gay men found that 3% of tops (insertive partners) and 16% of bottoms (receptive partners) reported significant pain.[76] Factors predictive of pain during anal sex include inadequate lubrication, feeling tense or anxious, lack of stimulation, as well as lack of social ease with being gay and being closeted. Research has found that psychological factors can in fact be the primary contributors to the experience of pain during anal intercourse and that adequate communication between sexual partners can prevent it, countering the notion that pain is always inevitable during anal sex.[12][75][76][77]

Female to female

[9][10]A woman performing anilingus (anal–oral sex) on another woman.

There is less research on anal sexual activity among women who have sex with women compared to couples of other sexual orientations, but stimulating the anus for sexual pleasure is stated to be a part of many lesbians' sex lives; the anus can be rimmed – the tongue moved around its edge – stroked or penetrated with the fingers or a dildo.[6][78] There are lesbians who like anal sex and others "who cannot bear the thought of it."[79] In 1987, a non-scientific study (Munson) was conducted of more than 100 members of a lesbian social organization in Colorado. When asked what techniques and lesbian sexual practices they used in their last ten sexual encounters, 100% reported kissing, sucking on breasts, and manual stimulation of the clitoris; more than 90% reported French kissing, oral sex, and fingers inserted into the vagina; and 80% reported tribadism. Lesbians in their 30s were twice as likely as other age groups to engage in anal stimulation (with a finger or dildo).[15]

While author Tom Boellstorff, when particularly examining anal sex among gay and lesbian individuals in Indonesia, stated that he has not heard of oral-anal contact or anal penetration as recognized forms of lesbian sexuality but assume they take place,[80] author Felice Newman cites anal sex as a part of lesbian sexual practices in her book The Whole Lesbian Sex Book.[6] Daniel Villarreal of Queerty.comsuggests that lesbians are better equipped to "teach heterosexual women" about anal sex than gay men are. "Firstly, they're women and anal sex feels different for women. Women lack that Giggity-spot called the prostate, so anal-loving [lesbians] know much more how anal sex feels as a woman than gay men ever could," he stated. "Most importantly though, women respond better to women. Ladies can approach the issue by discussing trust, communication, sobriety, HPV-prevention, and knowing your own body."[81]

Health risks

Anal sex can expose participants to two principal dangers: infections due to the high number of infectious microorganisms not found elsewhere on the body, and physical damage to the anus and the rectum due to their fragility. Increased experimentation with anal sex by young persons without sound knowledge about risks and what safety measures do and don't work may be linked to an increase in sexually transmitted infections.[82] Judy Kuriansky, a Columbia University professor and author, stated, "It really is shocking how many myths young people have about anal sex. They don't think you can get a disease from it because you're not having [vaginal] intercourse."[83]

Infection

[11][12]Mucous membranes of the rectum.

Unprotected anal sex, colloquially known as "barebacking",[84] carries an elevated risk of passing on sexually transmitted diseases because the anal sphincter is delicate, easily-torn tissue; a tear can provide an entry for pathogens. The high concentration of white blood cells around the rectum, together with the risk of tearing and the rectum's function to absorb fluid, places those who engage in unprotected anal sex at high risk of sexually transmitted infection. Use of condoms, ample lubrication to reduce the risk of tearing,[31][32] and other safer sex practices reduce the risk. However, a condom can break or come off during anal sex, so both sex partners must remain watchful during sex and there is still some risk if one or both partners carries a sexually-transmissible infection.[85]

Unprotected receptive anal sex is considered the sex act most likely to result in HIV transmission.[86][87][88][89] Other infections that can be transmitted by unprotected anal sex are human papilloma virus (HPV) (which can increase risk for anal cancer[90] and typhoid fever),[91] amoebiasis; chlamydia; cryptosporidiosis; E. coli infections; giardiasis; gonorrhea; hepatitis A; hepatitis B; hepatitis C; herpes simplex; Kaposi's sarcoma-associated herpesvirus (HHV-8);[92] lymphogranuloma venereum; Mycoplasma hominis; Mycoplasma genitalium; pubic lice; salmonellosis; shigella; syphilis; tuberculosis; andUreaplasma urealyticum.[16][93][94][95]

Cancer

Anal cancer is relatively rare, accounting for about 1 percent of gastrointestinal malignancies, but as many as 4,000 new cases can be diagnosed within a year in the United States, according to theAmerican Cancer Society.[96][97] Most cases of anal cancer are related to infection with the human papilloma virus (HPV).[96][97] Anal sex alone does not cause anal cancer; the risk of anal cancer through anal sex is attributed to HPV infection, which is often contracted through unprotected anal sex. The incidence of the disease has jumped 160% in men and 78% in women in the last thirty years, according to a 2004 American study. The increase is attributed to changing trends in sexual behavior (such as a history of multiple sex partners, fifteen or more, or receptive anal sex) and smoking. If a current smoker, there is a fourfold increase in risk, though independent of other behavioral risk factors, such as sexual activity. Receptive anal sex increases the incidence sevenfold.[97] Among the female control group studied, 21.5 percent had reported practicing anal sex, a significant increase from a previous case-control study by epidemiologist Janet Daling (PhD, member of Fred Hutchinson's Public Health Sciences Division) and her colleagues, published in 1987, in which 11 percent of female controls had reported ever having anal sex. This and other studies also indicate that gay or bisexual sex among men is on the rise, which may account for the increase in anal cancer.[97] "The sharpest increase was among African American men, whose incidence of anal cancer has more than doubled in the past three decades. Black men also had a lower survival rate from the disease." The study reported that the five-year survival rate for black men with early stage disease was 62 percent as compared to 79 percent for white men with localized cancer. However, the survey also reported that black men were more likely than white men to report having had intercourse with another male in the last year. Regarding all the increases, whether or not sexual practices have changed, Daling, concluded, "[I]t also could be that people are just more likely to discuss their sexual behavior these days."[97]

Physical damage

Physical damage to the rectum and anus can manifest as generalized ano-rectal trauma, anal fissures,[16] rectal prolapse, and exacerbating hemorrhoids.[98] Adequate lubrication and preparation reduces the risk of physical trauma,[99] while the risk increases with use of alcohol or other drugs that dull sensitivity.

Loss of bowel control is not a highly likely result of anal sex, but may be caused by repeated injury or the insertion of large objects.[100][Full citation needed][101] Kegel exercises have been recommended to maintain muscle tone by a speaker at theSociety for the Scientific Study of Sexuality and the American Association of Sex Educators, who noted he had never personally observed "loosening" in any of his patients.[102]

A 1993 study published in the Journal of the Royal Society of Medicine found that fourteen out of a sample of forty men receiving anal intercourse experienced episodes of frequent anal incontinence.[103] However, a 1997 study published in theAmerican Journal of Gastroenterology found no difference in levels of incontinence between homosexual men who engaged in anal sex and heterosexual men who did not, and criticized the earlier study for its inclusion of flatulence in its definition of incontinence.[104]

Cultural issues

[13][14]Suzuki Harunobu, A shunga print depicting an older and a younger man

Historically, a number of cultures have recorded the practice of anal intercourse between men.

Ancient and non-Western cultures

The term "Greek love" has long been used to refer to the practice, and in modern times, "doing it the Greek way" is sometimes used as slang for anal sex. However, homosexual anal sex was far from a universally accepted practice in Ancient Greece. It was the target of jokes in surviving comedies; Aristophanes mockingly alludes to the practice, claiming that "Most citizens are europroktoi (wide-arsed) now."[105] While pedagogic pederasty was an essential element in the education of male youths, these relationships, at least in Athens and Sparta, were expected to steer clear of penetrative sex of any kind. There are very few works of pottery or other art that display anal sex between older men and boys, let alone with adult men. Most such works depict fondling or intercrural sex, which was not condemned for violating and feminizing the boys. Other sources make it clear that the practice was criticized as shameful,[106] and seen as a form of hubris.[107][Full citation needed]

[15][16]Two Roman males on the Warren Cup, British Museum

In later Roman-era Greek poetry, anal sex became a common topos, represented as taking place with "eligible" youths: those who had attained the proper age but had not yet become adults. Seducing children into the practice was considered very shameful for the adult, and having such relations with a male who was no longer adolescent was considered more shameful for the young male than for the one mounting him. Greek courtesans, or hetaerae, are said to have frequently practiced heterosexual anal intercourse as a means of preventing pregnancy.[108] The acceptability of anal sex thus varied with the time-period and the location, as Ancient Greece spanned a long time and stretched over three continents and two major seas.

For a male citizen to take the passive (or receptive) role in anal intercourse was condemned in Rome as an act of impudicitia (immodesty or unchastity). Free men, however, frequently took the active role with a young slave, known as a catamite or puer delicatus. In fact the Romans thought of anal sex as something specifically "Greek," although Roman men often availed themselves of their own slaves or others in this way.[109][Full citation needed]

In Japan, records (including detailed shunga) show that at least some men in relationships with other men did engage in penetrative anal intercourse.

[17][18]Man and woman having anal sex. Ceramic, Moche Culture. 300 C.E. Larco Museum Collection

Evidence suggestive of widespread heterosexual anal intercourse in a pre-modern culture can be found in the erotic vases, or stirrup-spout pots, made by theMoche people of Peru; in a survey[110] of a collection of these pots, it was found that 31 percent of them depicted heterosexual anal intercourse, more by far than any other sex act. Moche pottery of this type belonged to the world of the dead, which was believed to be a reversal of life. Thus the reverse of common practices was often portrayed. The Larco Museum houses an erotic gallery in which this pottery is showcased.[111]

The 19th century anthropologist Richard Francis Burton theorized that there is a geographical Sotadic zone wherein penetrative intercourse between men is particularly prevalent and accepted; moreover he was one of the first writers to advance the premise that such an orientation is biologically determined.[112]

Western cultures

In many Western countries, anal sex has generally been taboo since the Middle Ages[113] when heretical movements were sometimes attacked by accusations that their members practised anal sex among themselves.[citation needed] At that time the mainstream Christian clergy was not celibate, but the highest orders of some heretical sects were, leading to rumours that their celibacy was a sign of their attraction to members of the same sex.[citation needed] The term buggery originated in medieval Europe as an insult used to describe the rumoured same-sex sexual practices of the heretics from a sect originating in Bulgaria, where its followers were called bogomils[citation needed]; when they spread out of the country they were called buggres (from the ethnonym Bulgars).[citation needed] Another term for the practice, more archaic, is "pedicate" from the Latin pedicare, with the same meaning.[114]

The Renaissance poet Pietro Aretino advocated the practice in his Sonetti Lussuriosi (Lust Sonnets).[115]

While men who engaged in homosexual relationships were generally suspected of engaging in anal sex, many such individuals did not. Among these, in recent times, have been André Gide, who found it repulsive;[116][Full citation needed] and Noël Coward, who had a horror of disease, and asserted when young that "I'd never do anything – well the disgusting thing they do – because I know I could get something wrong with me."[117][Full citation needed]

In religion

[19][20]François-Rolland Elluin,Sodomites provoking divine wrath, from Le pot-pourri (1781)Further information: Sodomy====Judaism====

The Mishneh Torah, a text considered authoritative by Orthodox Jewish sects,[118] states “since a man’s wife is permitted to him, he may act with her in any manner whatsoever. He may have intercourse with her whenever he so desires and kiss any organ of her body he wishes, and he may have intercourse with her naturally or unnaturally [traditionally, this refers to anal and oral sex], provided that he does not expend semen to no purpose. Nevertheless, it is an attribute of piety that a man should not act in this matter with levity and that he should sanctify himself at the time of intercourse.”[119]

Christianity

In Christian countries,[clarification needed] anal sex is sometimes referred to euphemistically as the peccatum contra naturam (the sin against nature, after Thomas Aquinas) or Sodomitica luxuria (sodomitical lusts, in one of Charlemagne's ordinances), or peccatum illud horribile, inter christianos non nominandum (that horrible sin that among Christians is not to be named).

Islam

Main article: Islamic views on anal sex

Liwat, or the sin of Lot's people, is officially prohibited by most Islamic sects. There are parts of the Qur'an which talk about smiting on Sodom and Gomorrah, and this is thought to be a reference to unnatural sex, and so there are hadith and Islamic laws which prohibit it. Same sex male practitioners of anal relations are called luti or lutiyin in plural and are seen as criminals in the same way that a thief is a criminal, meaning that they are giving in to a universal temptation.

Buddhism

Further information: Sexuality and Buddhism and LGBT topics and Buddhism

The most common formulation of Buddhist ethics is the Five Precepts. These precepts take the form of voluntary, personal undertakings, not divine mandate or instruction. The third of the Precepts is "To refrain from committing sexual misconduct."[120] However, "sexual misconduct" (Sanskrit: Kāmesu micchācāra literally "sense gratifications arising from the 5 senses"") is subject to interpretation relative to the social norms of the followers.[121] In fact, Buddhism, in its fundamental form, does not define what is right and what is wrong in absolute terms for lay followers. Therefore the interpretation of what kinds of sexual activity are acceptable for a layman is not a religious matter as far as Buddhism is concerned.[122]

Buddhism teaches that sensual enjoyment and desire in general, and sexual pleasure in particular, are hindrances to enlightenment.[123] Buddhist monks and nuns of most traditions are expected to refrain from all sexual activity and take vows of celibacy; lay people, however, are not expected to refrain from any specific form of sexual activity, and there is no concept of sinfulness attached to sex.

Hinduism

See also: History of sex in India and LGBT topics and Hinduism