Enema pornography involves adults given enemas to others, often fake. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. Lucky Pierre is slang for a nude milfs person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. This fetish sometimes originates from childhood memories of needing, or of seeing another needing, to urinate. The first pegging scene appears to have been in the non-pornographic 1970 film Myra Breckinridge, based on the novel of the same name by Gore Vidal, although it was not explicit. Women in homosexual relationships responded to this designation either by hiding their personal lives or accepting the label of outcast and creating a subculture and identity that developed in Europe and the United States. 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. Kinbaku means tight binding Kinbaku-bi which literally means the beauty of tight binding. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. Originating in Japan in gay hentai the 1980s, the genre subsequently spread to North America and Europe, and crossed videos gays over into gay pornography. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth.