"What?" Martin answers reflexively before he's even parsed the comment, turning halfway to find John looking at him. He doesn't understand even once he has parsed it. John's made mention of his freckles before, but not in a while, and now seems an odd moment to remark upon it like it's a fresh discovery.

But maybe he's just seeking some new place to put his attention. It could be he was watching Martin in the mirror and saw them just so in the light, or something like that. And it occurs to Martin rather belatedly that he's never been in such a state of undress around John so casually before, and he didn't even think to wonder if John was comfortable with that.

So he turns halfway back and starts to pull his shirt on, not wanting to draw any further attention to himself or the situation. "Y-yeah?" he says, chuckling softly, deciding to play into it. "So I've been told."