"W.. Why, of course! Is that not a simple thing one friend can do for another?" He easily agrees, desperate to move on from his dumb foot-in-mouth moment just now.

Except it doesn't hit him until a few moments later that it means he's going to have to imagine Rapunzel wearing any of this in his head.. Nope! Can't do that! It's wrong! But it's already too late to back out!

"Um, maybe you should pick a colour you like first..?"

Colours are good. Colours are safe.