This is a photo of me at age nine or ten pretending to play the French Horn.  Even though it was almost seventy years ago I can tell that I’m not really playing the instrument because I’m smiling, and also because I’m looking directly at the camera.  When you’re really playing the French Horn you can’t smile (because you have to purse your lips) and your eyes would be focused either on the music in front of you or on the conductor, not the camera off to your upper right.

Why is this important...