An important Indian chief had his three squaws sleeping on animal hides in his tepee. The first squaw slept on a cow hide, the second squaw slept on a horse hide, and the third squaw slept on a hippopotamus hide. Bye and bye, they all became pregnant and presented the chief with his heirs. The squaw who slept on the cow hide had a son, the squaw who slept on the horse hide had a son, but the squaw who slept on the hippopotamus hide had twin sons...
MORAL: The squaw of the hippopotamus is equal to the sons of the squaws of the other two hides