Three guys were fishing when one of them hooked a mermaid. She promised to grant each one of them a wish if they’d let her go.

“Deal,” the first fisherman said. “I’d like you to double my intelligence.” Immediately, he began to recite Shakespeare’s Macbeth.

“Wow!” the second guy exclaimed. “Could you triple my intelligence?” He’d no sooner made the request than he started spouting Einstein’s equations on the theory of relativity.

“That’s amazing!” the third fisherman yelled. “Quintuple my intelligence.”

“Are you sure?” the mermaid asked. “You may not like the outcome.”

“I’m sure. Just do it,” the guy said.

He closed his eyes to wait for the wish to be granted and-poof!-he became a WOMAN.