Pythagoras was not Greek, he was an American Indian chief
who had 3 wives, two of his squaws were rather plain
looking, but the third one was ravishingly beautiful, so
in his tepee he placed 3 hides for his wives to sleep on.
For the two plain wives he simply provided a simple buffalo
hide, but for his third beautiful wife he imported from
Africa a hippopotamus hide.
The 3 wives became pregnant at the same time, and they also
all delivered their babies at the same time. The two plain
wives had a single papoose each, but the beautiful wife
delivered twins. So Pythagoras was heard to exclaim:

"The squaw on the hippopotamus hide is equal to the sum of
the squaws on the two other hides"