On Thu, 10 Apr 2014 06:16:23 -0500, Leon wrote:
No. I played a ukulele when I was a kid but having chopped of half of my
left thumb would probably make learning to play a guitar difficult for a
right hander.

Well, you could learn to play with your teeth. Note: He is not using
any thumbs to do much.

https://www.youtube.com/watch?v=FrL5APQHMxY