Clothed male, naked female is one-sided female nudity in which one or more females are nude while one or more men are clothed. The term 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. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. For some people, non-penetrative sex is the primary sexual activity of choice above all others. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. Pornography may fall into more than one genre. Real medical shots or videos may violate privacy laws in some countries. Sadomasochism is practiced in isolation relatively rarely, though gay movies some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Lesbian pornography typically features a wider range of appearances and body types gay hentai than is typical of mainstream pornography. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Group sex pornography features at least two men and two women , usually more, porn milf who all perform sex acts on each other. Pussing: British expression for an activity involving a consenting couple where the male partner watches the woman urinate otherwise undetected in a semi-public place, usually a toilet cubicle at a pub, hotel, restaurant, theatre/cinema, office, club etc. Bear features a combination of middle-aged, hairy or overweight males.