Seemingly Contradictory Statements--Faulty Interpretations of Words Sexual Instinct and Love--Difference in Manifestations of Male and Female Sexual Instincts--Man's Sex Instinct Grosser Than Woman's--Awakening of Sexual Desire in the Boy and in the Girl--Woman's Desire for Caresses--Man's Main Desire for Sexual Relations--Normal Sex Relations as Means of Holding a Man--A Physiological Reason Why Man is Held--Man and Physical Love--Woman and Spiritual Love--Preliminaries of Sexual Intercourse in Men and Women--Physical Attributes-- Mental and Spiritual Qualities--Difference Between Love and "Being in Love"--Love as a Stimulus to Man--When the Man Loves--When the Woman Loves--Man's More Engrossing Interests--Lovemaking Irksome to Man--Man's Polygamous Tendencies--Woman Single-affectioned in Her Sex and Love Life--Man and Woman Biologically Different. XLVII. MATERNAL IMPRESSIONS 327 Wide-spread Belief in Maternal Impressions--No Single Well-authenticated Case of Maternal Impression--Birth of Monstrosities--Ridiculous Examples Given by Physicians-- So-called Shock Often a Product of Mother's Imagination-- Four Cases of Alleged Maternal Impressions--Mother's Health During Pregnancy May Have Effect Upon Child's General Health. XLVIII. ADVICE TO THE MARRIED AND THOSE ABOUT TO BE 336 Marriage as an Ideal Institution--Monogamic Marriage--Some Reasons for Husbands' Deviations--Importance of First Few Weeks of Married Life--Necessity for Understanding at Beginning--Preventing and Breaking Habits--The Wife's Individuality--Husbands Who are Childish, Not Vicious-- Wife's Interest in Husband's Affairs--The "Slob" Husband-- The Well-groomed Husband--Bad Odor from the Mouth--Odors from Other Parts of the Body--Treatment for Bad Odor from Perspiration--A Beneficial Powder--Advice Regarding Flirting--Dainty Underwear--Fine External Clothes and Cheap and Soiled Underwear--Delicate Adjustments of Sex Act Required with Some Men--Wife Who Discusses Her Husband's Foibles--A Professional Secret--A Case of Temporary Impotence--The Wife's Indiscretion--The Disastrous Result--A Big Stomach--The Wife's Attitude Towards the Marital Relation--Behavior Preliminary to and During the Act-- Congenital Frigidity--Prudish and Vicious Ideas About the Sex Act--Sexual Intercourse for Procreative Purposes Only--Fear of Pregnancy on the Part of the Wife--The Remedy--Other Causes--Wife who Makes too Frequent Demands-- Sacrificing the Future to the Present--Esthetic Considerations. XLXIX. A RATIONAL DIVORCE SYSTEM 356