It is sometimes hot gay sex described as a sexual fantasy, by women or men, depicting an exhibitionist or physique worship scenario. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. 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. A common way that these are depicted in a single scene is with one woman and two men performing together. 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 crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. After the prerequisite level of sexual stimulation has been achieved, and ejaculation becomes imminent, the male will position his penis so that the semen discharged will be deposited onto his partner face. This technique may include the use of a simulacrum, or artificial vagina. It like associating every Christian with the zealots who cause religious wars. In September 2003 the hentai porn BBC reported on the new dogging craze. It may be used as foreplay, or as an alternative to sexual penetration. Enema pornography involves adults given enemas to others, often fake. Voyeurism: Seeing another urinate without the person knowledge either through video taping by a hidden camera, or by lurking in locations where people are urinating or are likely to have an urge to urinate. For other scenes, particularly in established relationships, a safeword may be agreed to signify a warning rather lesbian milfs than explicit withdrawal of consent; and a few choose not to use a safeword at all. Fantasies of group sex are extremely common among both men and women, and group sex is a subgenre in pornographic films.