Older names for a pornographic film include stag film, and blue movie. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced. The scenario is a genre of erotica, which on the internet is sometimes abbreviated to CMNF, and may involve sexual and nonsexual erotic scenarios. Common positions include lying on back or face down, sitting, squatting, kneeling or standing. Terminology for roles varies widely within the various BDSM subcultures. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. Rape pornography features performers simulating rape. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the horny milfs context of British, Spanish and French colonialism and imperialism and their aftereffects. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Ass to mouth pornography shows the transfer of a performer penis from a second performer gay movies anus to that same second performer mouth in a single shot. Dwarfs or midget pornography features performers who are dwarfs/midgets. Double Stuffed , Double Vaginal , or Double hentai videos Anal pornography involves the penetration of one orifice by two penises or other objects. A sex party is a gathering at which sexual activity takes place. The term Asiaphile is sometimes used to describe the same phenomenon as is yellow fever . Other fetish Bareback pornography features performers who are not wearing condoms.