Abstract
Human beings are continuously engaged in finding solutions for their aggressive tendencies. Possible solutions are discussed in relation to biological and psychoanalytical models of aggression regulation. Phases an fixation points of aggression regulation are mentioned and related to the psychoanalytic concepts of safety, power and pleasure. Instrumental, situational and obediental aggression can be used for the reinforcement of the feeling states of regarded either as expression of sadistic aggression, or as expression of aggressiveness without investment of pleasure.