Kadath

An elephant is out walking in the jungle one day when he steps on a thorn bush and gets a large and painful thorn in his foot. He limps around, unable to get it out, until he comes across an ant who notices his plight. The ant offers to help the elephant out, who accepts, of course. After the thorn is gone the elephant says "Thank you so much! How can I repay you?"
The ant responds "Well, I'd like to fuck you in the ass."
The elephant is a little taken aback, but he figures what the hell, it's an ant, so he agrees, and goes on walking in the jungle with the ant busily plugging away. He comes upon a troupe of monkeys in a tree who, seeing the elephant immediately begin to pelt him with coconuts. One of the coconuts hits the elephant square in the head, and he cries out "OW! It hurts!"
The ant responds "Yeah, take it all, bitch!"

I never really got why this joke was so funny, and I guess it's in the telling, but I saw it in Maxim or some such magazine several years after I first heard it, so I figured it was boardworthy.

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