A study has shown that if you smile at people when you pass them that 3 out of 4 people will smile back. I did not believe this so I decided to test it out for myself. It is true. Most people will smile back. It also seems to make people feel better. They seem to have a sadness in their eyes that brightens right up when you smile at them. As for me, if it makes someone else's day a little brighter, than I will keep smiling.