It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . In human sexuality, a threesome is sexual activity that involves three people at the same time. The existence of such content in commercially available pornography is widely considered an urban legend. Femdom features BDSM scenes in which the dominant partner is female. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Shibari is a Japanese word that literally means to tie or to bind. It is commonly depicted in pornography, but very rarely in mainstream cinema. The range of its individual characteristics is thereby wide. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. The smotherbox is placed on a stable surface. The most common type of erotic spanking is administered on the bare buttocks, but can also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation gay sex video site in primates. Pornography in the early 2000s. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. Target audience are teenage anime hentai / young adult women. A male voyeur is commonly labeled Peeping Tom, a term which originates from the Lady Godiva legend. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. Foot fetish pornography features heavy emphasis on the feet of the participants, either in combination with kissing and genital sex or in the context of acts such as trampling or crush fetishism. Threesome momsex can also refer to a love triangle, a three-way romantic relationship.