During adolescence, teenagers are expected to develop standards of behavior and reconcile them with their perceptions of adult standards. In this context, music, a powerful medium in the lives of adolescents, offers conflicting values. The explicit sexual and violent lyrics of some forms of music often clash with the themes of abstinence and rational behavior promoted by adult society. Identification with rock music, particularly those styles that are rejected by adults, functions to separate adolescents from adult society. Some forms of rock music extend well beyond respectability in fulfilling this definitional role. Total immersion into a rock subculture, such as heavy metal, may be both a portrait of adolescent alienation and an unflattering reflection of an adolescent's perception of the moral and ethical duplicity of adult society. Physicians should be aware of the role of music in the lives of adolescents and use music preferences as clues to the emotional and mental health of adolescents.