Internal ejaculations, followed by images of semen dripping from the anus, are sometimes depicted in bareback gay pornography, where they are referred to by the term breeding or the reverse money shot. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates. Normal quantities of ejaculate range from 1.5 to 5.0 milliliters . It is suggested that much of the obscurity and the uncertainties mature milfs about female ejaculation are related to mixing up these two phenomena. Multiple men and celebrity porn women Bisexual gay movies pornogr gay cartoon porn aphy features one woman and two men who all perform sex acts on each other. Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. Double Stuffed , Double Vaginal , or Double Anal pornography involves the penetration of one orifice by two penises or other objects. The work of Bruce Seven has been called reality porn, due to his lack of using scripts and asking his performers to act naturally in their own character. In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. As a result, little in history was documented to give an accurate description of how female homosexuality is expressed. Shibari is a Japanese hentai sex word that literally means to tie or to bind. 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, naked celebrities and arguably more pain-susceptible animals . Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly.