Examples include the Girls Gone Wild and Girls Who Like Girls Series. Sex parties may be organized to enable people to engage in gay twinks casual sexual activity or for swinging couples or people interested in group sex to meet, but any gathering where sexual activity is anticipated can be called a sex party. The porn industry and viewing public 3d hentai were shocked by the then-taboo spectacle of a white woman having sex with a black man. Since development and pronunciation of the buttocks begins at menarche and declines with age, full buttocks are also a symbol of youth. It has also been recommended as a form of foreplay or safer sex. Usually that person prefers to stage the wetting so that his/her legs become soaked with urine. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part momsex of, masturbation. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. The name of the practice, when it is done in a repeated in-and-out motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. In addition to mainstream pornography, the popularity of facials has led to creation of its own niche market, like video series that specialize in showing the act. 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. Saliva pornography involves salivation and saliva. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable.