Three guys are having a relaxing day of fishing. Out of the
blue, they catch a mermaid – who begs to be set free, in
return for granting each of them a wish.

One of the guys just doesn't believe it, and says, “Okay, if
you can really grant wishes, then double my I.Q.”

The mermaid says, “Done.”

Suddenly, the guy starts reciting Shakespeare flawlessly, and
analyzing what he's recited with great insight.

The second guy is so amazed he says to the mermaid, “Triple
my I.Q.”

The mermaid says, “Done.”

The guy starts to spout solutions to problems that have been
stumping all the great scientists of the world: the
mathematicians, physicists, chemists, and so on.

The last guy is so enthralled with the changes in his friends
that he says to the mermaid, “Quintuple my I.Q.”

The mermaid looks at him and says, “You know, I normally
don't try to change people's minds when they make a wish, but
I really think you should reconsider.”

The guy says, “Nope, I want you to multiply my I.Q. times
five, and if you don't do it, I won't set you free.”

“Please,” the mermaid says, “you don't know what you're
asking! It'll change your entire view on the universe. Won't
you ask for something else, a million dollars, anything?” But
no matter what the mermaid says, the guy insists on having
his I.Q. increased to five times its usual power.
Finally, the mermaid sighs and says, “Done.”
And he turns into a woman.