On the series "NewsRadio, " the character played by Phil Hartman once said, "Experience once taught me that behind every toothy grin lies a second row of teeth." Smiling is a universal way to show happiness. But not all smiles are happy. In reality, we smile less for happiness than for social reasons that have nothing to do with happiness. That said, few things are more ingratiating and calming as another person's genuinely warm smile. But, maybe it's because a genuine smile is such a great