The term discipline describes psychological restraining, with the use of rules and punishment to control overt behavior. Crying pornography that features participating actors crying. Masturbation has gay hentai been gaysex depicted in art since prehistoric times and is mentioned and discussed in very early writings. Male masturbation may differ between males who have been circumcised and those who have not. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic milf xxx merit. Emetophilia pornography involving vomiting and gagging. Insertion in pornography features women inserting various odd objects into their anus or vaginas. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Pleasure for the giver during anilingus is usually based more on the principle of the act. It spawned numerous sequels, several of which won adult film awards. Enema pornography involves adults given enemas to others, often fake. 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. Fistees who are more experienced may take two fists . Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual men, and tends to focus on the more realistic obstacles and challenges that come with being homosexual in Japan. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . In many cases, that person is also aroused by smelling body parts that have a urine scent.