About the book: The book discusses the principles of mate selection and gender issues - the roles of men and women. You will find answers to questions such as: • What are the manifestations of masculinity and femininity? • How to choose an ideal partner? • Why do we choose similar partners? • How do gender stereotypes affect harmony in a couple? • What is the danger of toxic masculinity? • How to get to know your partner and protect yourself from pickup? • What mistakes do people make when choosing a partner? • How to determine compatibility with a partner? Choose the best partners!