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. However, various groups within society considered such depictions immoral, gay bear porn labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. The industry generally refers to such films as adult films, which is part of adult entertainment. A lesbian is a female homosexual; a female who experiences romantic love or sexual attraction to other females. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. Works in this genre may be considered adult for any number of reasons. A scene where many women have sex with one man is referred to as a reverse hentai videos gang-bang. The study also found that participants reacted positively to a much wider range of figures than a control group, even rating emaciated figures higher. A heterosexual threesome may involve two men and a woman, or one man and two women - that is, two men having sex with a woman , or two women with a man. Cartoon pornography depicts illustrated or animated fictional characters in erotic and sexual situations. Reading or viewing pornography, sexual fantasy or other erotic stimuli may lead to a desire for sexual release such as by masturbation. Often other friends and community members may witness the signing of such a document in a ceremony, and so parties violating their agreement can result in nude milfs loss of face, respect or status with their friends in the community. While wearing diapers, a diaper fetishist generally experiences a comforting feeling. Some POV/gonzo porn sometimes breaks the strict point-of-view convention.