In the Diagnostic and Statistical Manual of Mental Disorders , published by the American Psychiatric Association, it is classified under 302.89 – Paraphilia NOS and has no diagnostic criteria other than a general statement about paraphilias that says the diagnosis is made if the behavior, sexual urges, or fantasies cause clinically significant distress or impairment in social, occupational, or other important areas of functioning. Reality pornography is a genre of pornography where staged scenes, usually shot in cinéma vérité fashion, set up and precede sexual encounters. His most famous model was Bettie Page, who became the first celebrity of bondage film and photography. Bear features a combination of middle-aged, hairy or overweight males. Mammary intercourse gay fuck has sometimes been considered a perversion. Female masturbation involves the stroking or rubbing of a woman vulva, especially her clitoris, with an index or middle fingers, or both. These actors often play the top roles but this is not always the case, such as with Kristen Bjorn hamster mobile porn and some Bel Ami models. In some creampie films, both gay and straight, intercourse and internal ejaculation are followed by performers licking up the hentai sex semen that has dripped from their bodies. Threesome or 3some pornography features one man and two women . Women with women Main celebrity news article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, milf fuck but is typically aimed at a male audience. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. The fantasy is typically based hentai porn games around one or more larger beings dominating a smaller being. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse.