In today's world, with the popularity of Internet, TV and mobile phones, there are more and more videos of teenagers' intimate actions, which leads children to be more and more precocious, curious about the private things between men and women, and ashamed to talk about sexual knowledge with their parents, which leads to children's impulse to try and eventually lead to bad consequences.

Therefore, sex education is very necessary, and the sooner the better. Maybe some parents will say that my child is still young, only 3 years old, and there is no need for sex education. I don't know that when children are about 2 years old, they will form the initial gender consciousness, and they will be divided into two categories: boys and girls. By the time he was 3 years old, he could imitate different roles such as mom and dad to play house. At this time, you can show him sex education picture books.