Sex-education by Maurice A. Bigelow delves into the importance of understanding various sex-related issues beyond just reproductive health. The book explores eight key sex problems including personal sex-hygiene social diseases sexual morality and eugenics emphasizing the need for education and awareness in addressing these complex issues. Bigelow highlights the role of teachers in sex-education discussing the qualities training and collaboration required for effective teaching. The book advocates for a comprehensive approach to sex education aiming to guide individuals in making informed choices and fostering a responsible society in matters of sex and relationships.