Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. The nipples are erogenous gay movies zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. Interest in BDSM can range from one-time experimentation to a lifestyle. This is also the case in many relationships not considering themselves as sadomasochistic; it is considered to be a part of BDSM if it is practiced purposefully. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. Lesbian pornography made for women is usually made by women, and usually features women who identify as lesbian or bisexual. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic nude milfs industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. When questioned about her particular kink Covét replied, If we women have to take it from behind, then why not a man? Saliva pornography involves salivation anime hentai and saliva. Various groups within society have considered depictions of a sexual nature immoral, labeling them pornographic, and attempting to have them suppressed under obscenity and other laws, with varying degrees of success. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. Cum-shot pornography features a collection of male ejaculation scenes. Spanking or whipping pornography involves spanking or whipping, generally of the buttocks, with the hand or with other objects such as belts, switches, paddles, brushes, or whips.