It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is momsex 18. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates. Both sexes sometimes apply lubricating substances to intensify sensation. The other person may do the same during or after. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. Advocates of RACK argue that SSC can hamper discussion of risk because no activity is truly gay hentai safe, and that discussion of even low-risk possibilities is necessary for truly informed consent. Typically featured are hitting, choking, name-calling and hair-pulling. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. Pornography may fall into more than one genre. Hardcore pornography is pornography that depicts penetration or extreme fetish acts, or both. It is used, for example, at fertility clinics to stimulate gay movies sperm donors. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable. Lolita pornography features women who are 18 years old or slightly older, who pretend to be underage teen girls. The term Asiaphile is sometimes used to describe the same phenomenon as is yellow fever . The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven. Because the viewing of such films carried a social stigma, they were viewed at brothels, adult movie theaters, stag parties, at home, in private clubs and also at night cinemas. It has also been recommended as a form of foreplay or safer sex. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. Femdom features BDSM scenes in which the dominant partner is female.