The author describes a twenty-year-old youth with a history of delinquency (involving both theft and sexual offenses), on the basis of thirty-five irregular sessions which stretched over a period of five months. In this time the patient presented his rich dream and fantasy life but not a distinct biographical picture of his personality. There was a discrepancy between the boy's omnipotent wish fulfilment fantasies and his meagre efforts to realize them. His sexual fantasies dealt mainly with polymorphous perversions. His delinquencies seemed to be 'acted out' parts of his infantile fantasy life. The motive 'pleasure without guilt' indicated his tendency to repress guilt feelings. Other