Anyone else who does this with their cat?

Yeppers, pretty sure this is mandatory

no i am pretty sure if i tried this with my cat i would loose a finger

Guilty. So much that I now notice the urge to do that to my boyfriend when he yawns.

I don't do it everytime so that I still get to see her cute surprised face when I do.

I did! And I would try to grab their tongue when they were licking themselves.
I did that to a cat at Southern Agriculture (and got his tongue ) and the cashier about laughed his head off because he’d never seen anyone do that before.

She hates it. It's hilarious.

nope. She has to initiate the knawing.