A guy met this girl in a bar and asked, "May I buy you a drink?"

"Okay," she said, "but it won't do you any good."

A little later, he asks, "May I buy you another drink?"

"Okay," she said again, "but it won't do you any good." He invites her
up to his apartment and she replies, "Okay, but you know it won't do you
any good."

They get to his apartment and he says, "You are the most beautiful thing
I have ever seen. I want you for my wife."

"Oh, well that's different!" she says. "Send her in!"