When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. It is geared mature milfs towards heterosexual men, who most typically gay sex video define a threesome as such. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. The naked appearance of actress Demi Moore in the advanced stage of pregnancy on the cover of Vanity Fair magazine in 1991 marked the beginning of a period which has since seen pregnancy presented by celebrities as a glamorous state of living, while also creating a market for photographers to produce images of pregnant mothers, and for fashion stylists to introduce pregnancy styling to their business. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Voyeur pornography may also include shots of topless women on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. A woman can use a secondary vibrator, between the dildo and her genitals, to get pleasure from pegging. Its gain in prominence has been attributed to its depiction in the film Pecker, which was released in 1998. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head.