Amy laughs. She's not intentionally mean about it, but hearing 'my dress sense' coming from the Doctor elicits some mockery.

"What harm is there in knowin' you run around in bow ties and braces and Donegal Tweed?" she says, as though she's breaking some bad news.

And it only gets worse.

"Oh, and the occasional fez. I keep hiding them, an' somehow you always find more," she muses.