Have you ever come across someone who you thought was dressed or acted strange while riding public transports or walking in the streets? Found one of your fellow traveler extremely attractive? I would assume most of us would answer yes.

Do you remember the face of these persons? I can tell you that I don't.

Nobody really cares about strangers in big cities. They are part of the background. Sometimes you are struck by something then you move along. Even people who might actually be judging you will have forgotten you exist minutes later. That's the beauty of cities.