This book is dedicated to problems associated with the growing up and development of boys, their preparation for family life and future fatherhood. You will become more clear not only about the anatomical and physiological changes in the developing organism, but also everything that a boy needs to know about his hygiene and physiology. In a correct and tactful manner, the author explains everything that both adults and teenagers need to know in order to avoid unpleasant life situations. The book is intended for parents, teachers and teenage boys.