Nowadays, in such a big environment as China, everyone avoids talking about sexual knowledge, so children can't get sexual knowledge from the right channels, but only through sexual knowledge spread among children, which may distort sexual knowledge and cause some sexual crimes in society. Therefore, it is very important to guide children to have correct sexual concepts and family sex education. Why should we educate our children about sex? 1, and get the corresponding knowledge. Because sex is not just an independent single object, but a product of sexual psychology, sexual physiology and sexual emotion that people must understand in the process of growing up, proper sex education for children will help them understand this society, personal physical development and psychological changes, and accept themselves better. 2. Promote social stability. Correct sex education can help people to establish a harmonious marriage relationship and a scientific and civilized sex life, so that children can know how to respect themselves and everyone in society during their growth and development, and their future marriage life will be happier, so that there will be no more social behaviors such as marital infidelity and sexual assault mentioned in the news. 3. Promote physical and mental health. Because children don't have a correct understanding of their bodies, when girls' breasts begin to develop and even come to menstruation, they will feel very scared. At this time, it is necessary to correctly guide children to understand their own bodies and let them know that these are necessary in the process of growth, which is more beneficial to their physical and mental health. What is the main content of sex education? Knowledge related to human reproduction. It seems that every child will ask his parents where he is from, and parents often avoid talking about sex, and then say that the child was picked up from the trash can, which leads the child to misunderstand some people in this world from this time. 2. Normal sexual response behavior. Boys may have erections after seeing the girls they like, which makes everyone feel embarrassed, but in fact, these are normal sexual reactions, so they should be properly educated so that children don't feel too inferior and know how to adjust their emotions. 3. Contraceptive knowledge. When a child grows up, it will involve sex life. At this time, children should know how to use contraception, which can not only protect themselves, but also avoid such serious consequences as pregnancy before marriage. Sexual knowledge has been very scarce in our life, so parents' family education must be very rigorous, so that children can correctly know how to protect themselves and know themselves correctly.