Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. For their consent, they must have relevant information at hand and the necessary mental capacity to judge. Fetish cuckolding can have a wide range of expression, from pillow-talk fantasy between monogamous partners to extreme alternative lifestyles, depending on the couple. The fundamental gay twinks principles for the exercise of BDSM require that it should be performed with the informed consent of all involved parties. These disappeared with a crackdown on pornography hentai sex in the late 1950s. Explicit sexual activity, such as sexual penetration, may occur within a session, but is not essential. This is not due to a medical need. Though the term horny milfs anal sex most commonly means penile-anal penetration, sources sometimes use the term anal intercourse to refer exclusively to penile-anal penetration, and anal sex to refer to any form of anal sexual activity, especially between pairings as opposed to anal masturbation. Hamedori-type videos were produced from the beginnings of Japanese AV in the early 1980s. Asian fetish is a slang term which usually refers to an interest, strong attraction or preference for people, culture, or things of Asian origin by those of non-Asian descent. The term bareback is used less frequently in the heterosexual community. Gonzo pornography involves a first-person cameraman/performer perspective. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual men, and tends to focus on the more realistic obstacles and challenges that come with being homosexual in Japan. Some diaper wearers wear their diapers for limited amounts of time, while others prefer to wear them on a 24-hour, seven-day schedule. Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. The meaning of hentai is perversion, abnormality, or metamorphosis. Although macrophilia literally translates to simply a lover of large, in the context of a sexual fantasy it is used to mean someone who attracted to beings larger than themselves.