Three cases of father-daughter incest and two of brother-sister incest are the subject of this report. The incestuous experiences all occurred after the girls had reached puberty, and in four out of the five a pattern of later promiscuity became firmly established. The authors speculate regarding the psychodynamics

involved and emphasize guilt-feelings towards the mother, the tendency towards neurotic 'acting out', and the difficulty in restricting adolescent sexual impulses, once gratification has taken place. They raise questions as to why the incest barrier broke down in these cases and conclude that the causative factors were: the lax morals of the community, a defective superego, and the assumption of responsibility by the male. They contrast their findings with those of Bender and Blau, who concluded that sexual relations with adults were not necessarily traumatic when they occurred in the years before puberty.