The loose and direct camera work often includes tight shots of the genitalia, unlike some traditional porn. Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire. Testosterone discourages fat storage in these areas. Men may also rub or massage the glans, the rim of the glans, and the gay bear porn frenular delta. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Standing up, a chair, the corner of an item of furniture, or even a washing machine can be used to stimulate the clitoris through the labia and clothing. Coprophilia , also called scatophilia or naked milf scat , is the paraphilia involving sexual arousal and pleasure from feces. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Yaoi is anime or manga that features gay males . Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, deplorable, and hideous, but during the 20th century, these taboos generally declined. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. There is, however, no third party camera work involved. No causal relationship is known between masturbation and any form of mental or physical disorder. A scene where many women have sex with one man is referred to as a reverse gang-bang. Following the introduction 3d hentai of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation.