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. The strategies and tactics that are used to smuggle one of the couple into and out of the toilet undetected are as important or almost as important as the urination. The existence of such content in commercially available pornography is widely considered an urban legend. Pornography in the early 2000s. 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. Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating the man anus with a strap-on dildo. Advocates of RACK argue that SSC can hamper discussion of risk because no activity is truly safe, and that discussion of even low-risk possibilities is necessary for truly informed consent. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. The original definition of dogging – and which is still a closely related activity – is spying on couples having momsex sex in a car or other public place. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the gay twinks two partners. It has also been recommended as a form of foreplay or safer sex. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. It is sometimes combined with BDSM features. English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. Many cultures describe hentai porn pain as an aphrodisiac. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903.