"So there's this magic mirror in a bar, right?" Astoria says, skipping up to him.
"O…kay? Is this one of your jokes?"
"Yeah. So there's this magic mirror."
"How's it magic?"
"I'm getting to that. Geez. So if you say something in front of it that's a lie, it sucks you into it."
"That's not possible."
"It's what Muggles think about magic. It's not a history book."
"Fine. What's the rest of this joke?'
"A brunette walks up to the mirror and says, 'I think I'm the most beautiful girl in the world.' And she was sucked into the mirror."
"But she knew it was a lie, so she's clearly suicidal. Nobody's that narcissistic."
"Whatever. Then a redhead walks up to the mirror-"
"Is she a Weasley?"
"She's a Muggle, so no. The redhead walks up to it and says, 'I think I'm the smartest person in the world.' And she was sucked into the mirror."
"So she's suicidal, too."
"No. And then the blonde walks up to it and says, 'I think…' And she was sucked in."
Draco thought for a moment. "So, is this another one where blondes can't think? Sorta like that bottle one?"
"No, you idiot! The bottle one is saying she has no brains! This one says she can't think."
"I don't know, you can't really think if you have no brains, right?"
"You're doing it, aren't you?"