It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. If this is done using penises and/or strap-on dildos, this is sometimes called the sandwich or BigMac. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. Clothes wetting: The person is sexually aroused by wetting one clothing or observing another person doing so. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. Sexologist gay bear porn Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates. Jerk off instruction features a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm. A sex party is a gathering at which sexual activity takes place. The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving. The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven. The term Asiaphile is sometimes used to describe the same phenomenon as is yellow fever . Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, milf fuck etc. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, hentai movies and is used in the context of British, Spanish and French colonialism and imperialism and their aftereffects.