This makes varying degrees of stimulation an integral part of oral sex for many men. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. People may experience pleasure from anal sex by stimulation of the anal nerve endings, and 3d hentai orgasm may be achieved through anal penetration – by indirect stimulation of the prostate in men, indirect clitoral/G-spot stimulation in women, and associated sensory nerves . In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively passive . Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced. Diaper fetishism is totally independent from pedophilia as the wearer derives gay twink porn pleasure only from the diaper and/or use of it. This is commonly called double vaginal penetration or double stuffing. Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, momsex and that is why they appear jointly. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K.