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. If this is done using penises and/or strap-on dildos, this is sometimes called the sandwich or BigMac. The inside of a smotherbox is often videos gays padded to provide support for their neck and prevent their head from moving. The existence of such content in commercially available pornography is widely considered an urban legend. Many men who like trans partners of any variety, known as tranny chasers, do not necessarily identify as gay themselves. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. It like associating every Christian with the zealots who cause religious wars. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable. Since development and pronunciation of the buttocks begins at menarche and declines with age, full buttocks are also a symbol of youth. Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. Generally, interest differs between people, and gender depends on sexual orientation. For example, in Australia it is rated Refused Classification . Entacle erotica describes a type of pornography most commonly found in Japan which integrates traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction hentai movies theme. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. However, bisexual pornography is often placed near the gay section in adult porn milf video stores, since many consumers are gay men. Actual upskirt or downblouse shots may violate privacy laws in some countries. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography.