Such documents have not been recognized as being legally binding, nor are they intended to be. Special forms include erotic roleplay like ageplay, in which a difference in age, either real or enacted, formulates the background; or petplay. Gay pornography is the representation of sexual hentai sex activity between males. While some fantasize about a giantess who is slightly taller than himself, others are interested in giantesses that are hundreds or even thousands of feet tall. In Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work. Many of these activities might be based on rape. 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. Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels gay twinks a desire to wear or use diapers. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. No causal relationship is known between masturbation and any form of mental or physical disorder. During anal sex, male pleasure can be particularly derived from the prostate, which can lead to an orgasm and ejaculation. Rubber pornography involves rubber, latex, and similar materials. A study of the condom usage habits of New Zealand sex workers said that they offered various safe sex alternatives to vaginal naked milf sex to clients who refused to wear a condom. As women, they face concerns separate from men. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. Female masturbation involves the stroking or rubbing of a woman vulva, especially her clitoris, with an index or middle fingers, or both. Point of view pornography is adult entertainment filmed to look as if the watcher were experiencing the sex act themselves.