A smile typically signifies a positive emotional state—happiness, satisfaction, kindness, and warmth. The benefits of a positive mood, according to researchers, include improved heart health, ...

My young Greek language teacher, recently from Greece, complained that Americans smile too much and are too polite. We're always saying "please" and "thank you," she said, when it's not necessary. She ...

Many people don’t realize that there are various health reasons why someone might feel uncomfortable showing their teeth when ...