This is commonly called double vaginal penetration or double stuffing. In Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. During anal sex, male pleasure can be particularly derived from the prostate, which can lead to an orgasm and ejaculation. Instead, all five fingers are kept straight and held as close together as possible , then slowly inserted into a well lesbian hentai lubricated vagina or rectum. Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. In general, as compared to conventional relationships, BDSM participants go to great lengths to negotiate the important aspects of their relationships in advance, and to take great care in learning about and following safe practices. The precise definition of roles and self-identification is a common subject of debate, reflection, and discussion within the community. This type of pornography is almost exclusively hentai, as true hot gay sex hermaphroditic humans are not fertile and are not usually found in nature. The term is typically used by the cinematographer within the narrative framework celebrity gossip of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Breast fetishism is a paraphilic sexual big tit milf interest focused on female breasts . Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the bed, a partner leg or some scrunched-up clothing and hentai porno hump the vulva and clitoris against it.