Since at least 1973, it has also been used to refer to a sexually attractive young gay hentai woman. Lesbian pornography made for women is usually made by women, and usually features women who identify as lesbian or bisexual. Sex experts have praised various techniques that the performer can use during fellatio to increase their partner pleasure. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. Especially popular in post-World War 2 Japanese culture. Examples include the Girls Gone Wild and Girls Who Like Girls Series. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, milf xxx being positioned between the two partners. People may engage in anilingus for its own sake, before anal fingering or penetration, or as part of foreplay. It spawned numerous sequels, several of which won adult film awards. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth. The padding may also muffle noises from the outside, causing a relaxation effect and heightening their other senses. Amateur porn has been called hot gay sex one of the most profitable and long-lasting genres of pornography. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Simultaneous penetration of the mouth and either the vagina or anus. 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. This fetish sometimes originates from childhood memories of needing, or of seeing another needing, to urinate. For other scenes, 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.