There are number of types of sex parties: Swinger party/gathering A swinger party or partner-swapping party is a gathering at which individuals or couples in a committed relationship can engage in sexual activities with others as a recreational or social activity. The loose and direct camera work often includes tight shots of the genitalia, unlike some traditional porn. Rainbow parties were covered on The Oprah Winfrey Show in 2003, and became the subject of a juvenile novel called Rainbow Party. Pornographic films are typically categorized as either softcore or hardcore pornography. Reality pornography is a genre of pornography where staged scenes, usually shot in cinéma vérité fashion, set up and precede sexual encounters. Some masturbate only using pressure applied to the clitoris without direct contact, for example by pressing the palm or ball of the hand against underwear or other clothing. Felching is lesbian milfs a sexual practice involving the act of orally sucking semen best mobile porn out of the vagina or anus of one partner. The consensual submission of the submissive is sometimes demonstrated to others by symbols indicating his/her belonging to the dominant, such as wearing a collar, special tattoos, gay movies piercings, a very short haircut or a bald head. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. Barebacking usually refers to a conscious and deliberate choice to forgo condoms. Preggo pornography features pregnant performers and may include erotic lactation as a fetish. Evolutionary psychologists hentai videos suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre.