"I am not pouting - and besides, I doubt you'd just set me down if I did."

Ignoring the fact that his tone is, in fact, completely indicative of pouting, he actually isn't angry or upset; the awkwardness from earlier is completely gone, somehow, and he's enjoying the more physical sort of play going on.

...that won't stop him from further squirming once that statement is out there, of course, but at least he's back to smirking quite a bit.