Even through laughter, Kurt tries to keep up the lie. "No, no, I did! Right here!" He too sits up, reaching out to ghost fingers over the hair at his other self's temples. Which, yes in the moonlight does look like it has a shimmer. So also does his own hair, and he knows very well he has no grey in it yet. (His facial hair is a different story; there's more than one reason he hasn't revisited the goatee he had in his early twenties.) "Come now, would I deceive you? I'm hurt." He's full of shit, and a terrible liar.