However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. The term gay hentai combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish and French colonialism and imperialism and their aftereffects. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. A sex party is a gathering at which sexual activity takes place. Typically featured are hitting, choking, name-calling and hair-pulling. For much of the history of cinema and television, lesbianism was considered taboo, though since the 1960s it has increasingly become a genre in its own right. A related term used in the nude milfs genre is the term cougar, which implies an older woman as predator. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. A homosexual threesome would involve either three men or three women. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Rape pornography features performers simulating rape. Its gain in prominence has been attributed to its depiction in the film Pecker, which was released in 1998. Some men also enjoy anal stimulation, with fingers or otherwise, without any prostate stimulation. The industry generally refers to such films as adult films, which gay fuck is part of adult entertainment. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. Both forms of pornography generally contains nudity.