Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Voyeurism: Seeing another urinate without the person knowledge either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate. 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. Both forms of pornography generally momsex contains nudity. It is commonly depicted in pornography, but very rarely in mainstream cinema. The name hentai porn of the practice, when it is done in a repeated in-and-out motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea. Especially popular in post-World War 2 Japanese culture. The smotherbox gaysex is placed on a stable surface. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. Pornography in the early 2000s. A male voyeur is commonly labeled Peeping Tom, a term which originates from the Lady Godiva legend. Group sex is sexual behavior involving more than two participants. Lesbian pornography made for women is usually made by women, and usually features women who identify as lesbian or bisexual. A facial is a form of non-penetrative sex, though it is generally performed after some other means of sexual stimulation, such as vaginal sex, anal sex, oral sex or masturbation. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. Celebrity sex tapes are amateur or professionally-made recordings of sex acts, as performed by a celebrity and their partner.