Followers raved over Bailey's gorgeous grin and thanked her for spreading some joy. Related: Shih-Tzu's Stunned Face While ...

When we offer up a big, goofy grin, she matches us with a smile ... The bigger problem is that people often misinterpret a toothy smile as aggression and become scared, Haug says.

"Our results indicate that, contrary to previous assertions, detection of smiles or frowns is relatively slow in crowds of neutral faces, whereas toothy grins and snarls are quite easily detected." ...

The internet can't get enough of a Texas pup's goofy smile. Cheech was brought to ... Leah Sipe, the shelter's director, told Fox 13 that Cheech's toothy smile confused some volunteers at first.