When used as an alternative to penile-vaginal nude milfs penetration, the goal may be to preserve virginity or to prevent pregnancy. Pornographic films are typically categorized as either softcore or hardcore pornography. In Canada, Teletoon offers up its own Teletoon at Night programming block. The use of the word creampie hot gay sex to describe such scenes originated in U. Works in this genre may be considered adult for any number of reasons. Some straight actors have started acting in gay porn only to be accused of being gay while others first step was to strictly do solo hentai videos scenes. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced. Studies have found that masturbation is frequent in humans of both sexes and all ages, although there is variation. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. People may experience pleasure from anal sex by stimulation of the anal nerve endings, and orgasm may be achieved through anal penetration – by indirect stimulation of the prostate in men, indirect clitoral/G-spot stimulation in women, and associated sensory nerves . Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn and some Bel Ami models. 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. By comparison, gonzo pornography puts the camera right into the action, often with one or more of the participants both filming and performing sexual acts, without the usual separation between camera and performers seen in conventional porn and cinema.