Sexual orientation is a subject that is less and less a taboo. Homosexuality also seems to be more common or more talked about. This has led to stricter levels of modesty in same-sex situations, such as in changing-rooms. In several places, community showers have been converted to single showers, with curtains or doors. Many students no longer shower after exercise. Research has shown a dramatic decline in same-sex sexual activity among adolescent males that correlates with the increasing social visibility of gays and the increasing level of modesty. Related factors are the increasing emphasis on ideal male physiques shown by advertisements and the concern over being photographed and videotaped.