Three Indian squaws were due on the same day. The wise old medicine man put the first squaw on a deer hide, the second one on a bear hide, and the third one on a hippopotomus hide (don?t ask).

The first one had a boy, the second one had a boy, and the third one had twin boys.

The moral of the story? The squaw of the hippopotomus is equal to the sons of the other two hides.