Mrs. Potter: Oh this is fine, but let's get down to business. I haven't got all day.
Gerald: I'm not impotent when it comes to normal sex!
Mrs. Potter: I believe you, you're not impotent. Now, get off!
Gerald: I'm just tired. That's it, I'm tired.
Mrs. Potter: OK, so you're tired. Maybe you're not impotent. But you've got very little to be potent with!