A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. Sub-genres of Japanese porn Among the various sub-genres of Japanese pornography are the following: Lolicon ロリコン: This genre involves prepubescent gay bear porn and adolescent girls between the aged of 6-12. Participants usually derive naked milf pleasure from this, even though many of the practices—such as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. In more vigorous forms of fisting, such as punching or punchfisting, a fully clenched fist may be inserted and withdrawn slowly. Shibari is a Japanese word that literally means to tie or to bind. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Voyeurism: Seeing another urinate without the person knowledge either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these. Boot fetishism is a sexual fetish dedicated to boots. Women in homosexual relationships responded to this designation either by hiding their personal lives or accepting the label 3d hentai of outcast and creating a subculture and identity that developed in Europe and the United States. Matsuo used amateur actresses in his videos, and he usually traveled to their hometowns for the filming. For other scenes, particularly in established relationships, a safeword may be agreed to signify a warning rather than explicit withdrawal of consent; and a few choose not to use a safeword at all.