Gratification of the aggressive impulse is not possible unless the object defends itself. The reason for this condition can be found in the origin of aggression as response to prohibition or frustration. Many people try to satisfy the sexual and aggression impulse in one action, but this combination has, however, been given up by many as it involves undue risks and the efficiency of the individual is reduced while concentrating on two aims. It is suggested that the explanation of the combination of sex and oppression lies in the nature of the first prohibitions which always interfere with the sexual impulse and curtail the narcissistic omnipotence.