In more vigorous forms of fisting, such as punching or punchfisting, a fully clenched fist may be inserted and withdrawn slowly. Some techniques which may work for one individual can be difficult or uncomfortable for another. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. BDSM actions can often take place during a specific period of time agreed to by both parties, referred to as play, a scene or a session. The arousal from being desperate comes from the sensation of having a full bladder. Transsexual hentai videos pornography is a genre of pornography. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. Since development and pronunciation of the buttocks begins at menarche and declines with age, full buttocks are also a symbol of youth. There is no singular or archetypical behavior; therefore, a wide range of thought patterns and behaviors exist, but all tends to be a harmless and efficacious release from some kind of pressure. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Men may also rub or massage the glans, the rim of the momporn glans, and the frenular delta. Watersports pornography features sexual activities involving urine, such as videos porno gay golden showers. 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. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography.