John receives a phone call. "Hello," he answers. The voice on the other end says, "This is Susan. We met at a party about 3 months ago."

John: "Hmm... Susan? About 3 months ago?"

Susan: "Yes, it was at Bill's house. After the party you took me home. On the way we parked and got into the back seat. You told me I was a good sport."

John: "Oh, yeah! Susan! How are you?"

Susan: "I'm pregnant and I'm going to kill myself."

John: "Say, you ARE a good sport."

[Ed: Reportedly told by George Carlin in the '70s]