Well... [He avoids looking too directly at her as he hands the coat over and runs the proffered towel through his still-dripping hair.] Don't know if you'd call it a tune-up. We were in kind of a hurry. But that wasn't much more than a month ago.

[Still not making eye contact, he slips his glove into a pocket and rolls his sleeve all the way up to his shoulder. Underneath it, apart from a few scuffs on the cover, his arm is in pretty much the same condition that... future her left it in...? The point is, whatever the hell else is going on here, it clearly isn't damaged.]

See? Look at it all you want, I'm not lying. [Except arguably by omission.] You worry too much.

[Privately, he braces himself for some kind of reaction - but, looking on the bright side, maybe now she'll believe he wasn't trying to be creepy earlier.]