This work investigates the complex interplay of sexuality and marital structures throughout history and across cultures. Havelock Ellis, a pioneering sexologist, draws upon extensive research to explore the biological, psychological, and social dimensions of human sexual behavior within the context of marriage. The book examines societal norms, legal frameworks, and personal experiences, aiming to provide a comprehensive understanding of this fundamental aspect of human life.

Havelock Ellis's "Sex and Marriage" is recognized as a foundational text in the study of human sexuality and its relationship to marital institutions. Its comprehensive approach, blending historical, psychological, and sociological perspectives, offered a groundbreaking perspective for its time. The work is noted for its detailed examination of diverse cultural practices and its frank discussion of sexual matters, which challenged prevailing Victorian sensibilities. While some of its specific conclusions may be dated, its influence on subsequent sexology and social science remains significant.