出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/11/21 20:13:34」(JST)
In human sexuality, a threesome is sexual activity that involves three people at the same time.[1][2] When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Threesome can also refer to a love triangle, a three-way romantic relationship. Though threesome is most commonly applied to a casual sexual activity involving sexual activity among three participants, a threesome may also be found in a long-term domestic relationship, such as polyamory or a ménage à trois.[1]
A threesome is a form of group sex, but involving only three people. It may occur more frequently in private situations, such as spontaneous sexual activity among three friends, or arranged in a community of like-minded swingers or planned as a once-only experience;[3] and rarely in anonymous settings, such as at orgies or other sex parties. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. Some couples use a threesome as a way to develop a love triangle (ménage à trois).[4]
A threesome is a common element of sexual fantasy.[1] It is commonly depicted in pornography, but very rarely in mainstream cinema. One of the few films with a threesome is the erotic thriller Wild Things (1998) and its sequels Wild Things 2 (2004) and Wild Things: Diamonds in the Rough (2005), all of which involved a threesome of one man and two women. Zoolander (2001), Ken Park (2002), The Dreamers (2003), Savages (2012) and On the Road (2012) all contained a threesome of two men and one woman.
The people involved in a threesome may have any combination of gender and sexual orientation. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. It is a matter of subjective definition whether participation of a third person without physical contact constitutes a threesome. This may relate to fetishes such as voyeurism or cuckolding. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners.
Threesome sexual activity may take place in a number of sex positions; for example, the following:
Painting by Édouard-Henri Avril: threesome involving two men and a woman
Threesome involving double penetration
Threesome involving two men and a woman
Threesome involving two women and a man
A heterosexual threesome may involve two men and a woman, or one man and two women - that is, two men having sex with a woman (for example, in double penetration), or two women with a man. A bisexual threesome may involve a man having sex with a man and a woman, the woman having sex with a man and a woman, or all three having sex with each other. A homosexual threesome would involve either three men or three women. Other possibilities are possible, such as a man having sex with two women, who engage in lesbian sex with each other.[4]
As with all other forms of sexual activity, exchange of bodily fluids and contact of mucous membranes during a threesome may lead to the transmission of sexually transmitted infections. To ensure full efficacy when using barrier protection, care should be taken that neither side of a condom, female condom, dental dam or medical glove contacts more than one partner's mucous membranes. Additionally, one should be aware that hands and sex toys can spread fluids between partners.[5]
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| リンク元 | 「ternary」「三元」 |
| 拡張検索 | 「three-way stopcock」「three-way catheter」 |
| 関連記事 | 「way」 |