I wonder if there's a connection between these.
I've already told TMinus4 that I'm right-handed with my left thumb on top, but when you mentioned that you (a right thumber) are the one who thinks up the weird stuff, I couldn't help but mention that I, too, can do a weird thing:
I can write both upside-down AND backwards (at the same time). I can print and write in cursive, especially my name. I can also write my name so that it LOOKS like it's right-side up, but I write it from an upside-down position. Only someone very familiar with my handwriting is able to tell the difference.
Freaks my kids out when I sign their homework without turning the page around to do it. "How can you DO that, Mom??!!"
I tell them I have no idea why I can do it, or how...but I'd love to know the answer.
Regards,
PS: I can wiggle my ears, too....anybody doing a science project on that?