Sex education is not simply imparting physiological knowledge, but more helping people to establish scientific and positive sexual values. Scientific values require people to constantly think and learn sexual knowledge, while positive values require people to bravely face sexual puzzles and problems, handle and resolve conflicts and contradictions, make appropriate decisions, and adopt healthy and safe behaviors. Sex education teaches people to understand sex, life and love. Civilized society can not be separated from life and love, and can not be separated from sex education. It can be said that sex education is the light of civilization. Popularize sex education, promote sexual health and promote sexual civilization. Our China people's sexuality has changed from ignorance in the early days of the founding of the People's Republic to modern confusion. It can be said that on the one hand, we are ashamed of our desire for sex education, on the other hand, it is also the result of our lack of sex education. The rising number of people infected with AIDS, the occurrence of sexual assault, the present situation of gender inequality, the reality of sexual impotence, sexual freedom and the soaring divorce rate all urgently need the knowledge and concept of sex education to help people gain happiness better. Obviously, sex education is not everything, but a healthy and happy person and a civilized and harmonious country cannot do without sex education. Why do we need sex education? I think the most fundamental reason is our passionate pursuit of life, love and beauty in human nature.