Gardner postulates a primary pleasure in aggression, as distinct from defensive counteraggressions. The latter are motivated by fear. A major problem in the latency period is the achievement of mastery over one's aggressions. The aggressive, destructive, sexual delinquent is one in whom pregenital impulses find overt expression because of a lack of such mastery and because of the 'priming' of the sexual urges during puberty. Gardner makes specific recommendations about some of the legal aspects of such problems.