=XI. Sexual Disorders of Women=—Sexual Basis of Nervous Disorders—Neurasthenia—Anxiety Neurosis—Hysteria—Results of Unsatisfactory Marital Relations—Factors in Marriage That Influence Sexual Life—Sterility, or Barrenness—One-Child Sterility—Frigidity, or Sexual Coldness—Disorders Due to Abstinence—=Coitus Interruptus=—Common Disturbances of Women— Leucorrhea—Menstrual Disorders—Dysmenorrhea—Menorrhagia— Amenorrhea—Abortion: Spontaneous, Induced (Illegal or Criminal), and Therapeutic—Displacements of the Womb— Nymphomania—Masturbation—Exaggerated Statement of Its Evils— Why It Is a Bad Habit in Growing Boys and Girls. =XII.—Sexual Disorders of Men=—Nervous Disturbances—Fatigue from Mental Effort Alone a Rare Phenomenon—Sexual Factors in Neuroses—Nervous Breakdown from Suppressing Sexual Life—Sexual Determinants of Anxiety Neurosis—Sexual Neurasthenia; Hereditary and Acquired—Neurasthenia Not So Much Actual Nervous Debility As Lack of Control—=Coitus Interruptus= a Factor in Male Neurasthenia—Sexual Impotence and Sterility— Impotence Resulting from Continence-Absolute and Irremediable Sterility—Relative and Transient Sterility—Prostatitis— Azoospermia—Aspermatism—Satyriasis—Masturbation—Confusion with “Onanism”—Prevalence Among Animals—Opinions of Some Famous Medical Scientists. =XIII. Venereal Diseases=—Universality of Venereal Diseases— Gonorrhea—The Most Prevalent of Adult Infectious Diseases— Discovery of the Germ, and Its Description—Symptoms of the Disease—Infection of Innocent Wives—Effects of Gonorrhea on Women—“Honeymoon Appendicitis”—Gonorrhea Vulvo-vaginitis— Racial Effects of Gonorrhea—Gonorrhea As a Factor in Male Sterility—Ophthalmia Neonatorum—Syphilis—Description of Its Germ—Symptoms of the Different Stages—Becomes a Constitutional Disease—Ravages of the Tertiary Stage—Locomotor Ataxia and Paresis Among Late Effects—Hereditary Syphilis—May Be Cured If Properly Treated in Time—Chancroid or “Soft Sore”—Gangrenus Balanitis—Prostitution—Prostitutes Largely subnormal— Clandestine Prostitution.