It was thought up by Charles Darwin and it goes something like this:
In the beginning we were all fish... okay... swimming around in the water. And then one day a couple of fish had a retard baby, and the retard baby was different, so it got to live.
So retard fish goes on to make more retard babies, and then one day a retard baby fish crawled out of the ocean with its... mutant fish hands... and it had... butt-sex with a squirrel or something, and made this retard frog-squirrel, and then that had a retard baby which was a monkey-fish-frog, and then this monkey-fish-frog had butt-sex with that monkey; that monkey had a mutant retard baby that screwed another monkey and that made you. So there you go.
... You're the retarded offspring of five monkeys having butt-sex with a fish-squirrel. Congratulations!
(c) South Park
