Catharsis is a psychodynamic principle that, in its most basic sense, is simply an emotional release. Further, the catharsis hypothesis maintains that aggressive or sexual urges are relieved by "releasing" aggressive or sexual energy, usually through action or fantasy. For example, a young male may watch a film in which an attractive woman engages in sexual behavior. The young male may become sexually aroused from this and subsequently frustrated because of his inability to act out his sexual desires. To release this sexual tension, the young male may go outside and play sports or engage in fantasies about himself and the woman.