If People Had Tails ...

Were we meant to have tails? We each have a tailbone so why not, for it seems to have been part of the original plan for us all. We would all be so used to them, and they could be made to look so very decorative. But at some point it was clearly decided that we didn't really need them at all, which might have been a Very Good Decision, so tail-less we go. But then again...?