Lesbianism in erotica deals gay sex video with depictions in the visual arts of lesbianism, which is the expression of female-to-female sexuality. Voyeurism is the sexual interest in or practice of spying on people engaged in intimate behaviors, such as undressing, big tit milf sexual activity, or other actions usually considered to be of a private nature. Behind the Green Door was one of the first pornographic films to feature sex between a white actress with a black actor . 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. Yaoi is anime or manga that features gay males . A celebrity can fight the release in court to maintain deniability while still enjoying the career benefits. The industry generally refers to such films as adult films, which is part of adult entertainment. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. 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 . These styles are much closer to the style of bondage scenes in mainstream television. 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. Crush pornography features objects being crushed by an actress or actor, who generally plays an overtly dominant role. Cum shots typically do not appear in girl-girl scenes and orgasm is normally implied by utterances, cinematic conventions, or body hentai movies movement.