One night, two vampire bats were hanging upside down in a cave. One sas, "Hey, you wanna go and get some blood?" and the other bat says, "Where are we going to get blood at midnight?"

So the other bat says, "You don't want to go? Fine, I'll go by myself!" And off he flapped. About 30 minutes later, the first bat came back with fresh blood drpping out of his mouth and all over his body.

The second bat says, "Hey, where did you get all that blood!" The first bat says, "See that tree over there?" "Yeah," says the second bat...

"Well I didn't," said the first bat.