This book explores the psychology of sex, delving into a wide range of subjects including sexual inversion, erotic symbolism, sexual impulse in women, and the sexual impulse in men. It also covers the analysis of the sexual instinct, its development in childhood and adolescence, and its manifestations in adulthood. The author uses a scientific approach, drawing on extensive research and case studies to provide a comprehensive understanding of the topic. It's considered a pioneering work in the field of sexology.

A candid, accessible guide for general readers that answers common questions about anatomy, sexual response, techniques, contraception, venereal disease, pregnancy, masturbation, sexual dysfunction and variations, offering straightforward medical information, practical advice and social commentary intended to dispel myths and reduce ignorance about human sexuality (while reflecting the assumptions and language of its time).