Adolescence is an important stage of human growth and development, and it is also the early stage of sexual behavior. There are several important reasons for adolescent sex education: 1. Promote healthy growth: Adolescent sex education can help teenagers face up to their physical and mental development, accept their own knowledge and understanding of the body, and understand self-care and health care plans. At the same time, sex education can also let teenagers know the influence of sexual behavior on mental health and future life health, thus promoting the formation of good physical and mental quality and healthy lifestyle.

2. Prevention of sexual behavior and sexually transmitted diseases in early adolescence: Adolescent sex education can provide teenagers with more scientific and comprehensive sexual knowledge and moral education, help teenagers understand the consequences and responsibilities of sexual behavior, improve their ability and awareness of self-protection, and effectively prevent early sexual behavior and sexually transmitted diseases.

3. Avoid unnecessary mental injury: Sex education for teenagers can help teenagers understand that communication behavior that does not reflect organs is regarded as obscene behavior that violates personal dignity, and avoid psychological injury caused by indecent behavior of minors.

4. Enhance communication and trust between parents and children: Adolescent sex education helps parents to change the traditional education methods, educate parents to understand and respect the development needs of adolescents, guard against parents' bad educational behaviors, enhance communication and trust between parents and children, and create an open and supportive environment for gender equality.

To sum up, adolescent sex education is of great significance to promote the healthy growth of adolescents, prevent premature sexual behavior and sexually transmitted diseases, avoid mental injury, and enhance parent-child communication and trust.