Okay Max... please elaborate:

(1) Are you suggesting that this person could stretch his thumb *backwards* (across the back of his hand) to hook it on his pinky? egads....

(2) (and i'm honestly not trying to be obtuse, here) What exactly is twiddling? Isn't it when you lace your fingers together then twirl your thumbs? The natural pattern would be to twirl them in the same direction, one on top of the other, but it's not difficult to reverse one, provided you open your hands a bit to allow sufficient space between their rotating tips so as not to bump into one another. Am I doing it incorrectly? Even when i curl my tongue while twiddling one clockwise and the other counter-clockwise in this manner, i can't see where the problem might lie...

I'd appreciate your input, before my thumbs develop acute tendonitis

~b