Caleb just stops for a second, his own grin spanning wider as if Vincent's is catching, somehow. "A hedgehog. Congratulations, you are definitively the first person I've ever met who could say that."
It's a compliment. He lets a beat go by, which he's comfortable enough in casual conversation not to feel particularly weighted by, then: "It's going to sound like I'm feeding you a line if I say you've got a great smile, huh? I mean, inevitably it is a line, that's just the breaks of a compliment like that, but that doesn't make me wrong, either."