The term is a slang word that originated in the gay community and comes from the equestrian term bareback, which refers to the practice of riding a horse without a saddle. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. BDSM actions can often take place during a specific period of time agreed to by both parties, referred to as play, a scene or a session. In some societies, the terms fox, plum, chick, or chicken are preferred. In human sexuality, a threesome is sexual activity that involves gay sex video three people at the same time. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case hentai sex the only obvious distinction from amateur pornography is the higher quality of production, filming and editing. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures nude milfs as an erotic phenomenon. Participants usually derive pleasure from this, even though many of the practices—such as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. There may be more than two participants; both group sex and gang banging can be included. BDSM is a variety of erotic practices involving dominance and submission, role-playing, restraint, and other interpersonal dynamics. Animal masturbation has been observed in many species, both in the wild and in captivity. Some do not use the diapers at all, for arousal, or bladder and bowel movements. Voyeurism: Seeing another urinate without the person knowledge either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate.