Although interracial pornography theoretically can apply gay sex video to depictions of sexual activity between performers of any different racial groups, the term is most commonly used for heterosexual sex acts between black and white performers. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth. A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. Its primary goal is sexual arousal in its audience. For example, in Australia it is rated Refused Classification . Dwarfs or midget pornography features performers who are dwarfs/midgets. Celebrity sex tapes are amateur or professionally-made recordings of sex acts, as performed by a celebrity and their partner. Actual spying may violate privacy and/or trespassing laws in many countries. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. 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. Usually that person prefers to stage the wetting so that his/her legs become soaked with urine. As of 2013, little analysis of this paraphilia has been reported in medical literature. The term hentai is never used in this context in Japanese. Bisexual pornography is a genre of pornography which most typically momsex depicts one woman and two men who all perform sex acts on each other. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. Bhabha, lesbian hentai Anne McClintock and Kobena Mercer. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin length, is completely or partially covered and then uncovered in a rapid motion.