The fate of human tails

Q: Why don't humans have tails anymore?

A: The facts are pretty clear on this one. Even back in the Permian period, when we had tails, it was only half the population that had them.

Over time, as we no longer needed our tails to balance on 2 legs, the tail grew smaller and smaller and gradually moved forward on the body.

The end result, for my lucky male readers, is the small organ between your legs called a penis.