Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. Simultaneous penetration of the mouth and either the vagina or anus. In September 2003 the BBC reported on the new dogging craze. Pornography is often referred to as porn and a pornographic work as a porno. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth. Participants usually derive pleasure from this, even though many of the practices—such momsex as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. As in B/D, the declaration of the Top/Bottom may be required, though sadomasochists may also play without any Power Exchange at all, with both partners equally in control of the play. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. In more vigorous forms of fisting, such as punching or punchfisting, a fully clenched fist may be inserted and withdrawn slowly. This fetish sometimes originates from childhood memories of needing, or of seeing another needing, to urinate. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . The term hentai is never used in this context in Japanese. For other scenes, videos porno gay particularly in established relationships, a safeword may be agreed to signify a warning rather than explicit withdrawal of consent; and a few choose not to use a safeword at all. The term is a slang word that originated in the gay community and comes from the equestrian term bareback, which refers to the practice of riding a horse without a saddle. Many men who like trans partners of gay hentai any variety, known as tranny chasers, do not necessarily identify as gay themselves.