Mental Results of Unskilful Coitus--Women Understand the Art of Love
Better Than Men--Ancient and Modern Opinions Concerning Frequency of
Coitus--Variation in Sexual Capacity--The Sexual Appetite--The Art of Love
Based on the Biological Facts of Courtship--The Art of Pleasing Women--The
Lover Compared to the Musician--The Proposal as a Part of
Courtship--Divination in the Art of Love--The Importance of the
Preliminaries in Courtship--The Unskilful Husband Frequently the Cause of
the Frigid Wife--The Difficulty of Courtship--Simultaneous Orgasm--The
Evils of Incomplete Gratification in Women--Coitus Interruptus--Coitus
Reservatus--The Human Method of Coitus--Variations in Coitus--Posture in
Coitus--The Best Time for Coitus--The Influence of Coitus in Marriage--The
Advantages of Absence in Marriage--The Risks of Absence--Jealousy--The
Primitive Function of Jealousy--Its Predominance Among Animals, Savages,
etc, and in Pathological States--An Anti-Social Emotion--Jealousy
Incompatible With the Progress of Civilization--The Possibility of Loving
More Than One Person at a Time--Platonic Friendship--The Conditions Which
Make It Possible--The Maternal Element in Woman's Love--The Final
Development of Conjugal Love--The Problem of Love One of the Greatest Of
Social Questions.


CHAPTER XII.

THE SCIENCE OF PROCREATION.

The Relationship of the Science of Procreation to the Art of Love--Sexual
Desire and Sexual Pleasure as the Conditions of Conception--Reproduction
Formerly Left to Caprice and Lust--The Question of Procreation as a
Religious Question--The Creed of Eugenics--Ellen Key and Sir Francis
Galton--Our Debt to Posterity--The Problem of Replacing Natural