Apparently if I don't sing...

I had a conversation with someone today, and realized a little something about myself.

When I am having a lousy day, it is written all over my face. I can fake a smile better than anyone, but if I start thinking about anything less than happy, my face shows it. It's written all over, and impossible to hide. But something else that I didn't really know is that on days when I'm sad or overly preoccupied with something not so pleasant, I don't sing.

I don't hum anything. I don't sing, not even to the kids at work.

Today was a good day. I sung quite a bit.

But it's nice to have something to watch for.

If you don't hear me singing or humming or whistling or SOMETHING... 

Something's probably wrong.