Because it'll throw people off if you're just walking around naked! It's a matter of like dignity and besides most of 'em look nice.

[ Said the now-shirtless guy. But he opens his eyes hesitantly, and tries to work it onto her, around her wings (both sets) which... probably means that this rips as he tries to get it on. He feels a little silly now to be going this when he said that she was getting more, but they're already here, so... ]