Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their urine, or watching another person with an urgent need to urinate. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . In many cases, that person is also aroused by smelling body parts that have a urine scent. Entacle erotica describes a type of pornography most commonly found in Japan which integrates traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction theme. As of 2013, little analysis of this paraphilia has been reported in medical literature. Emetophilia pornography involving vomiting and gagging. Hentai is the various forms of Japanese pornography, lesbian hentai including H-manga, H-anime, and H-computer games. Male masturbation may differ between males who have horny milfs been circumcised and those who have not. In some societies, the terms fox, plum, chick, or chicken are preferred. Many men who like trans partners of any variety, known as tranny chasers, do not necessarily identify as gay themselves. Transsexual people Transman pornography features performers who were born female and who medically transitioned to male. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to gay twink porn create. Babysitter pornography features usually teenage girls being exploited and having taboo sex with older, male employers. This fetish sometimes originates from childhood memories of needing, or of seeing another needing, to urinate.