Studies among BDSM practitioners in the US have shown that about half of all men find the idea of bondage to be erotic; many women do as well. Locks may be used to emphasize the submissive position or the submissive hands may be fastened above his head to the box. These include gently sucking and tugging on the scrotum and use of lips to ensure minimal contact with their teeth. The loose and direct camera work often includes tight shots of the genitalia, unlike some traditional porn. Breast fetishism is a paraphilic sexual interest focused on female breasts . Some intend to create situations where others can see their wet clothing. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Drama Hardcore showed this kind of film hentai sex on its film. The current public acceptance of celebrities with sex tapes is speculated by Joe Levy, executive editor of Rolling Stone, to be due to the easy availability of pornography, as well as couples more commonly making their own tapes due to the prevalence of video cameras. Coprophilia , also called scatophilia or scat , is the paraphilia gaysex involving sexual arousal and pleasure from feces. The precise definition of roles and self-identification is a common subject of debate, reflection, and discussion within the community. Erotic spankings are commonly combined with other forms of sexual foreplay. A person may be sexually penetrated multiple times simultaneously. Perhaps following the example set by gay pornography, they have become a popular subgenre within heterosexual pornography since the turn of the century, featuring both vaginal and anal ejaculations. Creampie pornography features ejaculation inside the vagina , mouth or rectum instead of the common cum shot, followed by the visible seeping or dripping of semen from the vagina, mouth or anus. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn and some nude milfs Bel Ami models.