When you walk down the street by yourself, do you have a smile on your face? Is there a social rule that you should and say hi to everyone you walk past? I so often get called after that I should smile or that I should look cheerful, once I called back that I'll determine myself whether I smile or not. I know, it's probably just the opposite-sex looking for attention, but do they have a point? When I pass a group of males I usually look the other direction, I'm not waiting on their attention, maybe I should try smiling for a day but I'm afraid that will only ask for more attention.