Last week, my son told me that they had taken a lesson about adolescence. The lesson was introduced by the psychological teacher in the school. This lesson was for the boys of Grade 4 to Grade 6. His words reminded my memory of my teenage. I had no such class, or professional teacher for it. when I was at the same age as his. Much later than that, we had textbook about the topic, but the school had no plan for teaching. My teacher only said "read the book as you like", that's all. To most of us, the book was totally a "bad book", it's evil even with a peek.