Clothed female, naked male is a genre of erotica featuring one or more nude men and one or more clothed women. Jail/Prison/Police pornography involves people in police custody or inmates in jails or prisons in various sexual situations, such as strip searches or body cavity searches. As in B/D, the declaration of the Top/Bottom may be required, horny milfs though sadomasochists may also play without any Power Exchange at all, with both partners equally in hentai porn control of the play. Contact mutual masturbation One person touching another person to masturbate. In recent years, Japanese films of this genre have become more common in the USA and Europe although it still remains a small, fetish-oriented part of the adult film industry. Some productions are noted for sophisticated and/or experimental storytelling and animation techniques. This type of stimulation is typically all that is required to achieve orgasm and ejaculation. Rape itself is a crime in many countries. Caro rejected that as being a necessary conclusion, stating that female fatty deposits on the hips improve individual fitness of the female, regardless of sexual selection. Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person anus, or anus and rectum, for sexual pleasure. Enema pornography involves adults given enemas to others, often fake. In these cases, the appearance of an enlarged abdomen caused by obesity or overeating may be sufficient, or simply the suggestion of a protruding navel. In the 1970s, the hardcore pornography genre introduced the stereotypical videos gays cumshot scene as a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself. The speed of the hand motion will vary from person to person, although it is not uncommon for the speed to increase as ejaculation nears and for it to decrease during the ejaculation itself. High heel pornography involves women or men dressed in high heeled shoes. Pornography is generally classified as either softcore or hardcore pornography.