![sadie](https://peanutbutterfingers.files.wordpress.com/2010/05/sadie5.jpg)
We all do it: The closed-mouth smile. The smile that shows no teeth. The insincere smile that acknowledges someone’s presence, but doesn’t convey happiness. Today as I let a man walk in front of my car, he waved thank you and gave me a smile… A big, toothy smile. It felt so genuine and real…