The most common depiction of a hermaphrodite is a person with a female face, breasts, and build, and a penis , although there are other combinations. 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. Fistees who are more experienced may take two fists . Cum-shot hentai sex pornography features a collection of male ejaculation scenes. The nipples are erogenous milf xxx zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. This yields a view that would not be obtainable directly through the eyes of a person while experiencing the sex act. Often, slave contracts are set out in writing to record the formal consent of the parties to the power exchange, stating their common vision of the relationship dynamic. 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. For example, the Kama Sutra, in particular, goes into specific detail on how to properly strike a partner during sex. Also see POV. Central to the typical MILF narrative is an age-play dynamic of older women and younger lovers. Bukkake pornography usually depicts numerous men having sex with one woman, with multiple, usually 10 or more, men ejaculating on the female face. The 1979 U. 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. After the prerequisite gay cock level of sexual stimulation has been achieved, and ejaculation becomes imminent, the male will position his penis so that the semen discharged will be deposited onto his partner face.