Often a dominant woman, she may be called a Dom, Domme /ˈdɒm/, Femdomme, Domina, or Dominatrix, depending on context or personal preference. Arousal may be triggered by seeing the body movements or facial expressions of that person. Foot fetishism, foot partialism, foot worship, or podophilia is a pronounced sexual interest in feet. The Japanese sex hentai sex industry uses the term Paizuri . While bondage is a very popular variation within the larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. The first film was released in 1980 gaysex starring Kay Parker. Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. Masturbation has been depicted in art nude milfs since prehistoric times and is mentioned and discussed in very early writings. POV pornography involves camera angles designed to provide the viewer a view similar to that seen by one of the participants, whose face is never shown. First found in softcore movies and erotic thrillers, depictions of lesbianism entered mainstream cinema in the 1980s. Generally, interest differs between people, and gender depends on sexual orientation. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. Group sex can occur between people of all sexual orientations and genders. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games.