Havelock Ellis 
Psychology of Sex 
The Biology of Sex-The Sexual Impulse in Youth-Sexual Deviation-The Erotic Symbolisms-Homosexuality-Marriage-The Art of Love

Psychology of Sex, 12th Impression covers the psycho-physical processes of sex, their liability to disturbance, or their hygiene. This scientific inquiry of sex is the representation of experimentally demonstrable data with the aid of mathematical symbolism. This book is composed of eight chapters that focus on the normal phenomena of sex. After a short introduction to the fundamentals of sexual psychology, this book goes on discussing the physical basis of courtship and sex. The subsequent chapters describe the nature of sexual impulse, particularly in youth, factors contributing to sexual deviation, erotism, and sexual inversion. These topics are followed by examining various sex-related issue in marriage, including sexual abstinence, sexual satisfaction, impotence, and frigidity. The last chapters deal with the dynamic nature of sexual impulse in relation to love. This book will prove useful to psychologists, psychiatrists, parents, and the general public who are interested in the biological nature of sex.