It is a FINGER! And pianists must learn to use it that way! As a college student, I had to unlearn years of bad habits in using my thumb. Why? I was using it like a thumb, the way it naturally works, and I was thumping keys when I should have been pushing them like the rest of my fingers were doing. Until I got to college, no one had worked with me on correcting this issue. For a while, I was obsessed with it, and as I listened to other pianists, I found I could tell, wit