When a child turns 12–13 years old, a new side of life opens up for him, and parents are faced with more problems: sex, relationships, changes in the body, attractiveness to peers... But the teenager is embarrassed to discuss sensitive topics with his “ancestors”, out of habit drawing knowledge from the Internet. Can random links satisfy his thirst for hope and up-to-date information? Sex educators Evgeniy Kashchenko and Anna Koteneva know exactly what worries teenagers: they are based on answers to real questions from hundreds of girls and boys. With the help of answers from leading experts and a detailed illustrated dictionary, parents will be able to form a sexual culture in their growing children, strengthen mutual trust and take care of their health and future happy life today.