Human urinal: An act common in the bondage sex community where a male or female slave will serve as a urinal for a dominant partner. Often, slave contracts are set out in writing to record the formal consent of the parties to the power exchange, stating their common vision of the relationship dynamic. However, the tradition of bondage magazines continues in the form of art books of bondage photographs, published by mainstream publishers such as Taschen. Contact mutual masturbation One person touching another person to masturbate. Actors are mostly amateur; any well-known actors in bisexual porn tend to be from the gay pornography industry. In many cases, that person is also aroused by smelling body parts that have a urine scent. Common phrases used to refer to these individuals are chicks with dicks, trannies, or shemales, although these are generally considered pejorative slurs among transwomen. Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. Bestiality pornography involves the sexual attraction of humans to animals. Accepting that Eros is not always pretty, and may involve the forbidden or taboo - as videos gays with women pornography – forms part of the struggle with the good girl/bad girl or virgin-whore split in postmodern femininity. Some actors who are actually gay or bisexual will be marketed as straight to appeal to the allure of the unattainable, because straight men are virgins to sex with other men, and as in most gay male settings, the young, the muscular, and the unfamiliar are more sought.. Real jail or prison or police station shots or videos may violate laws in some countries. Bukkake, Gokkun, Omorashi, and tentacle erotica are few uniquely Japanese genres known to western viewers. In September 2003 the BBC lesbian hentai reported on the new dogging craze. Spanking or whipping pornography involves spanking milf fuck or whipping, generally of the buttocks, with the hand or with other objects such as belts, switches, paddles, brushes, or whips.