So this guy walks into a bar and at the bar is sitting a freak, with a tiny little head the size of a baseball.
So he sits down next to the freak and pretty soon they've struck up a conversation, they're talking about sports, rating the broads in the bar, whatever.
After about an hour, the guy can't stand it any more and says: "Look, I hate to be rude, but what's the deal with your head?"
The freak says, "That's O.K., I'll tell you."
"I used to be normal-looking. One day I was walking down the beach and found this mermaid entangled in a fishing net. She said 'help me, and I'll grant you a wish.' So I pulled out my pocket knife and cut her loose and she said, "what's your wish?'"
"So I'm looking at her, and she's like a total babe, just incredible, but her bottom half is a fish -- you get it? She has no pussy! So I say, 'Well, how about a little head?'"