The existence of such content in commercially available pornography is widely considered an urban legend. Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. For example, in Australia it is rated Refused Classification . Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. It contains graphic sexual activity and visible penetration. Bondage websites and bondage imagery in mainstream pornography As of 2003, specialist bondage magazines were mostly displaced by the availability of bondage material on the World Wide Web, and the presence of bondage imagery in mainstream pornographic magazines such as Nugget and Hustler Taboo magazine. Multiple men and women Bisexual pornography features one woman and two men who all perform horny milfs sex acts on each other. Though there have been numerous gang bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen men. Kurt Wild, who appeared as a bottom in Lucas Entertainment Gigolos, is married to a woman and has three children. Double Stuffed , Double Vaginal , or Double Anal pornography involves the penetration of one orifice by two penises or other objects. Some aspects of the research community hentai sex distinguish between female ejaculation and what is colloquially known as squirting or gushing. Pussing: British expression for an activity involving a consenting couple where the male partner watches the woman urinate otherwise undetected in a semi-public place, usually a toilet cubicle at a pub, hotel, restaurant, theatre/cinema, office, club etc. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Among swinging couples, one of the two gay movies partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse.