Some couples use pornography at times for variety and to create a sexual interest or as part of foreplay. Sexual scenarios may involve male domination, female submission, exhibitionism and erotic entertainment. The films were financially successful, winning AVN Awards for the best selling pornographic films of their year; however the events were effectively un-officiated and the record breaking claims often misleading. Yuri is the lesbian equivalent. Am Abend , one of the earliest pornographic films hentai videos that have been collected at the Kinsey Institute for Research in Sex, Gender, and Reproduction, starts with a female masturbation scene. Fisting may be performed with or without a partner. These typically are leaked to the public via the Internet, with or without the celebrity consent. This type of censoring also extends to comics, video games, and anime made for adults. The first film was released in 1980 starring Kay Parker. Most consumers of bisexual pornography do not identify as gay. A threesome is a form of group sex, but involving only three people. One-sided male nudity can also arise when a male disrobes as part of a male striptease. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. Hamedori-type videos were produced from the beginnings of Japanese AV in the early 1980s. Although interracial pornography theoretically can apply to depictions of sexual activity between performers of any different racial groups, the term is most commonly used for heterosexual sex acts between black and white performers. Masturbation involves touching, pressing, rubbing or massaging a person genital area, either with the fingers momsex or against an object such as a pillow; inserting fingers or an object into the anus ; and stimulating the penis or vulva with an electric vibrator, which may also be inserted into the vagina gay fuck or anus.