Some POV/gonzo porn sometimes breaks the strict point-of-view convention. The cover is open while the submissive lies down on his back and places his head in the box. The most successful animated features produced in the United States primarily for adult audiences were directed by Ralph Bakshi, including Fritz the Cat, Heavy Traffic and Coonskin. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Sadomasochistic scenes sometimes reach a level that appear more extreme or cruel than other forms of BDSM—for example, when a masochist is brought to tears or is severely bruised—and is occasionally unwelcome at BDSM events or parties. A person may be sexually penetrated gaysex multiple times simultaneously. A smotherbox gives a more dramatic experience . Nevertheless, it is only an attempt at phenomenological differentiation. In a few relationships, it milf fuck leads as far as total submission of one partner in the truest sense of the phrase total power exchange . In Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work. The consensual submission of the submissive is sometimes demonstrated to others by symbols indicating his/her belonging to the dominant, such as wearing a collar, special tattoos, piercings, a very short haircut or a bald head. These styles are much closer to the style of bondage scenes in mainstream television. This genre also features male-on-male fellatio through a small hole made in a bathroom divider. Some men place both hands directly on their penis during masturbation, while others may use their free hand to fondle their testicles, nipples, or other parts of their body. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees. Women with women Main hentai videos article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience.