A policeman found a dead body of a man on the street. He thought he recognized the body and the 2 friends he usually hung out with, so he called in one of the friends.
The friend looked into the dead body's face and said, "Yep, that's definitely Joe," but then, to be absolutely sure, he turned the body over, pulled down the back of his pants, and said, "Oh no, wait, that's not Joe." The policeman called in the 2nd friend. The 2nd friend looked into the dead body's face and said, "Yep, that's definitely Joe," but then, to be absolutely sure, he turned the body over, pulled down the back of his pants, and said, "Oh no, wait, that's not Joe." Confused, the policeman asked, "How is it that when you look into his face you're sure he is your friend, but when you look at his ass you're sure he is not?"
The 1st friend said, "Well, you see, Joe has 2 assholes." "Are you serious?" the policeman asked. "Oh yes," he replied, "we've never actually seen them, but when the 3 of us hang out together people point and say, 'Hey, there's Joe with those 2 assholes.'"