I Suppose I Might be a Dog After All
From The Other End of the Leash, by Patricia McConnell, " Retracting the commissure in dogs signifies submission or fear. Sometimes it has a similar significance in humans: some researchers believe that human smiles evolved from the submissive grimaces seen in many primate species. We're all familiar with happy smiles but think of all the smiles you've seen that were related, to some degree, to nervousness. Perhaps you, like me, have smiled when you wished you wouldn't, anxiously awaiting test results or submissively seeking favors from someone in authority. Primates also have a similar expression, somewhat akin to a nervous or submissive 'smile,' termed the 'open mouth bared tooth display,' which is associated with relaxed, friendly, social contact."
Two people have given me grief about looking "unhappy" at choir events. I've been accused most of my life of looking miserable. I'm also told that I frighten people. Think these may be related? Perhaps I am a bit of a dog, like those jerks in junior high said.