Power of the sexual instinct, 1 Sexuality as the foundation of ethical feeling, 1 Love as a passion, 2 History of development of sexuality, 2 Modesty, 2 Christianity, 4 Monogamy, 4 Woman’s place in Islam, 5 Sensuality and morality, 5 Decadence of sexual morality, 6 Development of sexual feelings in the individual; puberty, 7 Sensuality and religious enthusiasm, 9 Relations between the spheres of religion and sexuality, 9 Sensuality and art, 10 Idealizing tendency of first love, 11 True love, 11 Sentimentality, 11 Platonic love, 12 Love and friendship, 12 Difference between male and female love, 13 Celibacy, 14 Unfaithfulness, 15 Marriage, 15 Desire for adornment, 16 Facts of physiological fetichism, 17 Religious and erotic fetichism, 17 Eyes, odors, voices, and mental qualities as fetiches, 21 Hair, hand, and foot of woman as fetiches, 22 II. PHYSIOLOGY, 23 Sexual maturity, 23 Duration of sexual instinct, 23 Sexual sense, 24 Localization (?), 24 Physiological development of sexuality, 24 Erection; erection-centre, 24 Sexuality and the olfactory sense, 26 Flagellation an excitant of sexual desire, 28 Sects of flagellants, 28 Paullini’s “Flagellum Salutis,” 29 Erogenous zones, 31