Not a Fuck

The Wolf wanted very much to beat the Rabbit, but he had no pretext. The Rabbit owned a shop, so the Wolf came up with an idea to ask him for something he wouldn't have, and would beat him up for not having it.
So he goes to rabbit's shop and asks "Rabbit, have you got carrots?"

"Sure." said the Rabbit. And wolf had to buy carrots.

The following day Wolf went there again.

"Have you got nails, Rabbit?"

"I sure do" And wolf bought the nails.

It pissed the Wolf off so much that he thought hard and when he went to the Rabbit again, he asked:

"Hey Rabbit, do you have 3 pounds of 'not-a-fuck'?" he asked.

'Damn,' thought the Rabbit, 'now he's got me' But after a while the Rabbit proposed: "Wolf, let's go to the storehouse, and see whether there is 'not-a-fuck' left"

They go to the storehouse, and Rabbit opens it's door. It's extremely dark inside, just black.

"So Wolf' said Rabbit' can you see anything?"

The Wolf stares inside the house, and replies:

"Not a fuck, Rabbit!"

"Then take your 3 pounds and get lost!"