Yawn!

I have yawning fits sometimes where I yawn till my eyes water. As far as I know, it's a mystery why we yawn. The Mythbusters once tested the myth that yawning is contagious. I don't remember if they proved it true, or if they busted it. I think my yawning fits are what caused me to draw this drawing. I drew the character yawning the way Charlie Brown shouts something like "AAARG!!!" The top of his head goes back so you can't see it. I wonder if doctors or scientists have ever tried to discover why we yawn.