The term is a slang word that porn milf originated in the gay community and comes from the equestrian term bareback, which refers to the practice of riding a horse without a saddle. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Homi Bhabha defined the idea of a racial fetish in contrast to the idea of the Freudian sexual fetish which he describes a denial of difference, where the male sees the female as a castrated male, seeing missing parts rather than a different anatomy. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias. Sometimes special furniture is used, such as a queening stool or smotherbox. The term hentai is never used in this context in Japanese. Lesbianism has been a theme in erotic art since at least the time of ancient Rome, and many regard depictions of lesbianism to be erotic. While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. He talked to them extensively on camera so that both he and the viewer can come to know them before any sex scenes. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Simultaneous penetration of the mouth and either the vagina or anus. This may relate to fetishes such as voyeurism or cuckolding. In addition to mainstream pornography, the popularity of facials has led to creation of its own niche market, like video series that specialize gaysex in showing the act. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. This is commonly called double anal or double stuffing. Tentacle rape or shokushu goukan is hentai videos found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters.