Hentai narrow Japanese usage and broad international usage are often incompatible. Yuri : Featuring two grown adult women in a homosexual/lesbian relationship. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Crush pornography features objects being crushed by an actress or actor, who generally plays an overtly dominant role. In some creampie films, both gay and straight, intercourse and internal ejaculation are followed by performers licking up the semen that has dripped from their bodies. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Those with diaper-related paraphilias differ widely in their focus of attention. Biological momsex anthropologist Helen B. Cartoon pornography depicts illustrated or animated fictional characters in erotic and sexual situations. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Irrespective of the legal or social view of pornography, it has been gay movies used in a number of contexts. Preggo pornography features pregnant performers and may include erotic lactation as a fetish. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Testosterone discourages fat storage in these areas. A person hentai porn may be sexually penetrated multiple times simultaneously. Gonzo pornography is a style of pornographic film that attempts to place the viewer directly into the scene. In Japan, point of view pornography is referred to as hamedori . Such grounds and even the definition of pornography have differed in various historical, cultural, and national contexts. Swinging can take place in various contexts, ranging from a spontaneous sexual activity at an informal social gathering of friends to a regular social gathering in a sex club or residence. However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success.