Was that a challenge? It sounded like a challenge.

His smirk gets a lot more real as he reaches one arm back, grabbing his shirt between his shoulder blades and yanking it up and over his head. Bare-chested, he holds out his arms for inspection.

"See? No blight." Well, none that can be seen, anyway. He waggles his eyebrows and adds: "You'll have to trust me about the rest of it."