And let's not forget popular culture. Oh, the songs people sing to us sometimes when we don't feel like smiling:

"Let your smile be an umbrella from the rain."
"Put on a happy face."
"Cheer up, Charlie."
"Pack all your troubles in an old kit bag and smile, smile, smile."
"Let the sun shine in, take it with a grin."

The following line to that last one is, "Smilers never lose, and frowners never win." Whatever happened to "never say never"?

And what's wrong with honesty, that American culture wants to hide behind a smiley mask?