Jack and Jill were working at a sawmill, under the Big Bad Wolf.
Times were hard, and the mill was not making money, so the Big Bad Wolf had to lay someone off. Since Wolf rather liked Jill, he called her in, to give her a choice of who to lay off. "Jill," he said, "I've got to either lay you, or Jack off. Which would you prefer?".
Jill screws up her face, and says, "Could you jack off? I've got a headache."
