Your smile -- simple, straightforward, and most important, sincere -- can attract more than admiring looks. A smiling face tells people that youre an outgoing and intelligent person worth getting to know. "When someone has a big smile, it shows theyre willing to open up and expose a part of themselves," says Pamela McClain, DDS, a past president of the American Academy of Periodontology. Over the long term, smiling can benefit your health, perception at work, social life, and romantic status. With that much at stake, it's worthwhile to discover what your smile is saying about you -- and how to interpret the smiles flashed your way.