I remember that it is in the textbook of grade one and next semester, that is, grade seven. I remember very clearly that the book wrote about menarche and how to pay attention to physical hygiene. At that time, our biology teacher was a boy, so I let myself finish reading this chapter without saying a word. Some schools in China have little sex education. Many teachers feel embarrassed and embarrassed. In addition, if parents are embarrassed to talk about it, it is actually not conducive to the healthy development of teenagers' body and mind in some aspects.