It is sometimes described as a sexual fantasy, by women or men, depicting an exhibitionist or physique worship scenario. Within a BDSM or D/s context, facesitting can be an especially intense form of erotic humiliation. Technically this is a form of exhibitionism rather than group sex per se. Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms to an object. The first film was released in 1980 starring Kay Parker. Now facial cumshots are regularly portrayed in pornographic young gay porn films, videos, anime hentai magazines and internet web sites. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. To tea bag is a slang term for the sexual act of a man placing his scrotum in the mouth of a willing sexual partner for pleasure or onto the face or head of another person. Men and women may masturbate momsex until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. The other is in the top of the box to expose their face. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies. Though the term anal sex most commonly means penile-anal penetration, sources sometimes use the term anal intercourse to refer exclusively to penile-anal penetration, and anal sex to refer to any form of anal sexual activity, especially between pairings as opposed to anal masturbation. In the 1970s, the hardcore pornography genre introduced the stereotypical cumshot scene as a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself. Some actors who are actually gay or bisexual will be marketed as straight to appeal to the allure of the unattainable, because straight men are virgins to sex with other men, and as in most gay male settings, the young, the muscular, and the unfamiliar are more sought..