Introduction to Sexology, as a sex education textbook in quality education, is suitable for universities and middle schools. It can also be used as training materials or teaching reference for teachers in universities, middle schools, primary schools and kindergartens, as well as reference books for doctors and scholars in gynecology, andrology and psychological counseling. It is also a convenient "assistant" for prosecutors and legal personnel to handle sex-related cases. This book is also a reading for lovers, parents who are enthusiastic about family quality education and social youth to improve their quality. Relevant government departments can also refer to this book when formulating relevant laws and regulations.