The author presents a review of the main special features of the psychosexual development of paraphiliac subjects. These anamnestic signs can according to his view contribute in an impor- tant way to assessment of the diagnosis of a sexual deviation and assessment of the sexual orien- tation of probands. In addition to assessment of psychosexual developmental specific features he recommends within the framework of the anamnestic exploration also an analysis of other sphe- res of life of the clients which may play an important role in subsequent treatment and influence substantially also possible relapses of delinquent sexual behaviour.

        Key words: sexual orientation, paraphilia, diagnosis, case-history.