Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. For other diaper fetishists, simply wearing a diaper, the bulking feeling and crinkling sounds associated with it, is enough to cause the fetishist a form of erotic pleasure or sexual arousal. Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early gay movies writings. Sometimes special furniture is used, such as a queening stool or smotherbox. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . A facial is a form of non-penetrative sex, though it is generally performed after some other means of sexual stimulation, such as vaginal sex, anal sex, oral sex or masturbation. Insertion in pornography features women inserting various odd objects into their anus or vaginas. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of momsex the person. Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. Teacher and Student or Boss and Secretary pornography involves sexualized situations which take place between an authority figure, such as a teacher or boss, and an underling, such as a student or secretary, often fake. Emetophilia pornography involving vomiting and gagging. Well-known female porn stars who expressed their pleasure in pegging their male hentai porn partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. Individuals who can change between top/dominant and bottom/submissive roles—whether from relationship to relationship or within a given relationship—are known as switches, though the term switch in this context is occasionally seen as derogatory and is rejected by many who might simplistically fit the definition.
