In the fetish cuckolding subculture, it is most common for the female to take on the sexually milf xxx dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. Irrespective of the legal or social gay boy porn view of pornography, it has been used in a number gay hentai of contexts. Femdom features BDSM scenes in which the dominant partner is female. Portrayals of lesbians in the media suggest that society at large has been simultaneously intrigued and threatened by women who challenge feminine gender roles, and fascinated and appalled with women who are romantically involved with other women. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. These scenes may involve the female actor calling for the shot to be directed at some specific part of her body. Evolutionary psychologists suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. Use of the agreed safeword is seen by some as an explicit withdrawal of consent.