In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Lolita pornography caters to ephebophiles. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. This makes varying degrees of stimulation an integral part of oral sex for many men. In these research publications, it is suggested that real female ejaculation is the release of a very scanty, thick, and whitish fluid from the female prostate, while the squirting horny milfs or gushing shown frequently in pornography is a different phenomenon, the expulsion of clear and abundant fluid, which has been shown to be a diluted fluid from the urinary bladder. Femdom features BDSM scenes in which the dominant partner is female. Kurt Wild, who appeared as a bottom in Lucas Entertainment Gigolos, is married to a woman and has three children. They may regard it as an enhancing element of their sex lives or as their primary form of sexual activity. Among swinging gay movies couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. Reality and voyeur pornography, animated 3d hentai videos, and legally prohibited acts also influence the classification of pornography. Yaoi is anime or manga that features gay males . John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films.