Hello, if you are stared at by a lewd man on a bus or subway or in some crowded public places, do not have any reaction to him. The more you look at some lewd men, the more you , but he became more enthusiastic and could completely ignore him. If you feel uncomfortable being stared at, you can get off the car or leave midway, and try to stay away from lewd men.
If there is a physical collision, you can shout it loudly to let people around you pay attention to him and make him restrain himself. Again, for your own safety, try to stay away from lewd men.