[Solved] Review the evidence for the role of the brain's reward systems in a model of the cause of drug addiction in general. Voyeuristic Disorder: A condition characterized by significant personal distress or impairment in social, occupational, or other important areas of functioning arising from a persistent or predominant focus on observing unsuspecting individuals who are naked, in the process of disrobing, or engaging in sexual activity. Sexual Intercourse: A physical activity involving the genital organs of at least two people for sexual stimulation or reproduction. Guilt Feelings: Emotional distress caused by the belief that one has done something wrong or failed to do something right. Transvestite: An individual who dresses in the clothing typically associated with the opposite sex, often for personal or psychological reasons.