Strange thing, Amos. I thought I had posted the Theramin about three hours prior to your post. Don't know what happened to it. I expect it was that I started looking on You Tube for Theremins, and got sidetracked. Even a cat can play one BLICKY.
My argument was that it is technically a No-Handed instrument, as you do not actually make contact with it at all.
Quack!
GtD.