A few short words and the frightening scene he saw left an indelible impression on the young man.Occupationally, he spent his youth in the garrison barracks, where he would rather suffer the jeers of his companions than wander with them. "I'm already a man," he said, "and I've had my weak days, but to this day I'm horrified by the sight of a prostitute." Don't tell your students too much, but choose the time, place, People, educate them by examples, will definitely achieve results.