The book by world-famous American specialists William Masters and Virginia Johnson presents systematically almost all aspects of human sexual life. The book was written as a textbook for students, which determined the simplicity and clarity of presentation. The biological, psychological and cultural aspects of sexuality, various forms of sexual behavior, disorders of sexual function, sexually transmitted diseases and AIDS are considered. For doctors, psychologists, teachers, students and specialists, as well as all readers who want to gain knowledge about human sexuality from a reliable, serious source.