Leopold Löwenfeld addresses various insights and disorders of sexuality in this specialized book, which is also easily understandable for laypeople. He explains the development of sexuality in childhood in clear language, points out nervous disorders during puberty, as well as nervous and psychological disturbances during menstruation and pregnancy. He discusses sexual abstinence in men, as well as abstinence and lack of sexual satisfaction in women. In a further chapter, Leopold elaborates on the anomalies of sexual drive in terms of quantity and quality. This work is a comprehensive book offering many aids and suggestions for sexual problems. Leopold Löwenfeld (1847 to 1924) was a German physician and is considered a pioneer of sexual pathology.