They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. His most famous model was Bettie Page, who became the first gay teen porn celebrity of bondage film and photography. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. A celebrity can fight the release in court to maintain deniability while still enjoying the career benefits. It contains graphic sexual activity and visible penetration. Works in this genre may be considered adult for any number of reasons. The name was coined from the title of the controversial book. If one person is penetrated by two objects, it is generically called double penetration . The loose and direct camera work often includes tight shots of the genitalia, unlike some traditional porn. Content featuring male bisexuality has been a growing trend since the advent of internet pornography. Bear features a combination of middle-aged, hairy or overweight males. Bestiality is illegal in many countries. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. Biological anthropologist Helen B.