The Constituents of Semen. Function of the Prostate. The Properties of Semen. Aphrodisiacs. Alcohol, Opium, etc. Anaphrodisiacs. The Stimulant Influence of Semen in Coitus. The Internal Effects of Testicular Secretions. The Influence of Ovarian Secretion. IV. The Aptitude for Detumescence. Is There an Erotic Temperament? The Available Standards of Comparison. Characteristics of the Castrated. Characteristics of Puberty. Characteristics of the State of Detumescence. Shortness of Stature. Development of the Secondary Sexual Characters. Deep Voice. Bright Eyes. Glandular Activity. Everted Lips. Pigmentation. Profuse Hair. Dubious Significance of Many of These Characters. THE PSYCHIC STATE IN PREGNANCY. The Relationship of Maternal and Sexual Emotion. Conception and Loss of Virginity. The Anciently Accepted Signs of This Condition. The Pervading Effects of Pregnancy on the Organism. Pigmentation. The Blood and Circulation. The Thyroid. Changes in the Nervous System. The Vomiting of Pregnancy. The Longings of Pregnant Women. Mental Impressions. Evidence for and Against Their Validity. The Question Still Open. Imperfection of Our Knowledge. The Significance of Pregnancy. APPENDIX. Histories of Sexual Development. INDEX OF AUTHORS. INDEX OF SUBJECTS. EROTIC SYMBOLISM. I. The Definition of Erotic Symbolism--Symbolism of Act and Symbolism of Object--Erotic Fetichism--Wide extension of the symbols of Sex--The Immense Variety of Possible Erotic Fetiches--The Normal Foundations of Erotic Symbolism--Classification of the Phenomena--The Tendency to Idealize the Defects of a Beloved Person--Stendhal's "Crystallization." By "erotic symbolism" I mean that tendency whereby the lover's attention is diverted from the central focus of sexual attraction to some object or process which is on the periphery of that focus, or is even outside of it altogether, though recalling it by association of contiguity or of similarity. It thus happens that tumescence, or even in extreme cases detumescence, may be provoked by the contemplation of acts or objects which are away from the end of sexual conjugation.[1]