Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. A male voyeur is commonly labeled Peeping Tom, a term which originates from the Lady Godiva legend. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that hentai movies it is not uncommon in heterosexual relationships. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. For legal reasons, the vast majority of so-called videos gays reality porn involves professional actors and actresses posing as so-called amateurs. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Evolutionary psychologists suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. Rape pornography features performers simulating naked milf rape. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. The rise of the Internet in the late 1990s and early 2000s similarly changed the way pornography film was distributed and furthermore complicated the censorship regimes around the world and the legal prosecution of obscenity. Terminology for roles varies widely within the various BDSM subcultures. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. The term sadomasochism is derived from the words sadism and masochism .