Buttocks are sometimes emphasized gaysex in pornography, where they are often referred to as booty. 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. Cartoon pornography depicts illustrated or animated fictional characters in erotic and sexual situations. Such grounds and even the definition of pornography have differed in various historical, cultural, and national contexts. 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 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. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually hentai movies to the point of orgasm. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Real school shots or videos which are sexualized may violate privacy laws in some countries. Milking pornography features lactating women being milked or milking themselves . Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard. There are various subcultures under this umbrella term and distinct difference between these subcultures. Studies have found that masturbation is frequent in humans of both sexes and all ages, although there is variation. Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. Some POV/gonzo lesbian milfs porn sometimes breaks the strict point-of-view convention. Gonzo pornography is a style of pornographic film that attempts to place the viewer directly into the scene.