Here's one that graced our e-mail inbox this afternoon. Stop me if you've heard this:

Two men are heading to a ski lodge in a blinding snowstorm. They see a house and figure they had better pull over. They knock on the door and a woman answers. They explain their predicament. She says that she is recently widowed, and it wouldn't be appropriate for two strange men to stay in her house, but they're welcome to stay in the barn and leave the next day. They say thanks and head to the barn.

Flash forward nine months.

One of the men (call him Joe) gets a letter from the woman's lawyer, reads it, and calls his friend (call him Frank).

Joe: Do you remember the time we stayed in that woman's barn nine months ago?
Frank: Yes.
Joe: Well, did you happen to leave the barn and visit the woman that night?
Frank: As a matter of fact, I did.
Joe: And did you happen to give her my name instead of yours?
Frank: Yes, I'm afraid I did. I knew I wasn't behaving properly, and I was embarrassed by my actions, so I gave her your name. I know that wasn't right of me. I'm sorry. But why do you ask?
Joe: Well, it turns out that the woman just died and left me all her money.