The genres and sexual intensity of videos is mainly determined by demand. Depending on the genre of the film, the on-screen appearance, age, and physical features of the main actors and their ability to create the sexual mood of the video is of critical importance. Most actors specialize in certain genres, such as straight sex, bisexual sex, gay sex, lesbian sex, bondage, strap-on sex, anal sex, double penetration, semen swallowing, teenage women, orgy sex, age roleplay sex, fauxcest sex, interracial or MILFs and much more. The pornography industry in the United States was the first to develop its own movie star system, primarily for commercial reasons. In other countries, the 'star' system is not common, with most actors being amateurs. Most performers use a pseudonym and strive to maintain off-screen anonymity.
