Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating the man anus with a strap-on dildo. Advocates of RACK argue that SSC can hamper discussion of risk because no activity is truly safe, and that discussion of even low-risk possibilities is necessary for truly informed consent. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. BDSM is a variety of erotic practices involving dominance and submission, role-playing, restraint, and other interpersonal dynamics. A sub-set of vaginal fisting attempts to photograph the female cervix immediately after the fist is removed from the now-gaping vagina. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work. Dwarfs or midget pornography features performers who are dwarfs/midgets. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. First found in softcore movies and erotic thrillers, gay sex video depictions of lesbianism entered mainstream cinema in the 1980s. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual lesbian hentai intercourse with female characters. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. It spawned numerous sequels, several of which won adult film awards. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another momsex person.