Hermione looks rather like a deer in the headlights at first, but manages a slight smile. "I rather think I could live with that. It's, er...it's not really the done thing back at home, that's all."

Well, not in areas where Muggles could see- but the Muggle/wizarding gap is absurd and useless here. She imagines that rather a lot of people fit in neither category, after all.