He almost laughs. Not in that bad-natured villain chuckle sort of way, but in a way that reminds him that they used to have these sort of 'talks' but they never turned out good. At least the tone of voice Jack takes gives him a fair warning of what would happen if he continued giving him a difficult time.

"That's not giving me much incentive to remove it, now is it?"

It's not like he removed it just for Ana. She only saw it because she ripped the mask off his face by accident (or was it). He picks at the shirt, the soft crackling sound of smoke billowing out from the opening puffing out like a bizarre chimney. Yeah, he looks ridiculous. HE DOESNT CARE.