Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century construct. Dwarfs or midget pornography features performers who are dwarfs/midgets. There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature. Sex parties may be organized to enable people to engage in casual sexual activity or for swinging couples or people interested in group sex to meet, but any gathering where sexual activity is anticipated can be called a sex party. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Throughout history, women have not had the same freedom or independence to pursue homosexual relationships as men, but neither have they met the same harsh punishment as homosexual men in some societies. The arousal from being desperate comes from the sensation of having a full bladder. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. Target big tit milf audience are teenage / young adult women. It is commonly depicted in pornography, gay twinks but very rarely in mainstream cinema. Pornography in lesbian hentai the early 2000s. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates. Jerk off instruction features a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm. Entacle erotica describes a type of pornography most commonly found in Japan which integrates traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction theme. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth.