Because it can awaken people's understanding and pursuit of love and sex, life and beauty. At first, people understood sex education as transmitting basic knowledge of physiology and health. With the progress and development of society, modernity education is not only a simple sexual health education, but also includes many aspects such as preventing sexual assault, promoting gender equality, mastering the principles and skills of love and marriage and sexual interpersonal communication, reflective morality and sexual law. It can be said that sex is with us all our lives, and so is sex education. Most families in our country care about teenagers mainly in learning and health, and take an evasive attitude towards adolescent sex education, lacking correct guidance. Most parents talk about "sex" discoloration. Sex and reproduction seem to be shrouded in gloom and mystery forever, and even the reproductive system involved in the natural anatomical structure of the human body cannot be accepted equally with other systems. I even worry that teenagers will fall into a wrong path if they come into contact with sex too early, let alone have a dialogue with them on the issue of "sex". This practice intensifies teenagers' desire for sexual behavior, and teenagers can't find suitable places for sexual counseling. Sex education will not make sex happen early, but it will only happen without sex education or wrong sex education. Teenagers should know where they come from, what actions will bring harm to themselves, and how to minimize the harm when they encounter infringement.