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 and adolescent girls between the aged of 6-12. Bestiality pornography involves the sexual attraction of humans to animals. Targets the male audience, but is much less popular than Yaoi. The legal status of masturbation has also varied through history and masturbation in public is illegal in most countries. 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. In gay pornographic movies, actors who identify themselves as heterosexual, but who nevertheless perform explicit sexual acts with other males on film do not face the same stigmas as the mainstream acting counterparts and indeed can rise quickly momsex to being featured actors. Anti-pornography psychologist Ana Bridges and colleagues conducted a content analysis of best-selling heterosexual pornographic videos showing that over 96% of all scenes concluded with a male performer ejaculating onto the body of his female partner. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual gay movies men, and tends to focus on the more realistic obstacles and gay hentai challenges that come with being homosexual in Japan. Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. A common way that these are depicted in a single scene is with one woman and two men performing together. Fisting pornography features the insertion of an entire hand into a performer vagina or anus. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms.