[Munch's Master]

^I agree with Max's suggestion here. The legs I'd imagine were originally longer and more flexible, designed for gripping and swinging through tree branches, but as their brains developed for whatever reason (Naturally or through environmental changes), they began to undertake the medical profession, and for whatever reaso nfound their tree-dweller legs were unsuitable for thier new lifestyle, so amputated them. Over time I'd then imagine they will evolve to naturally posess shorter legs, much in the way we evolved fro mthe hairy caveman wh oneeded the hair for warmth, to modern man who doesn't need the hair to the same degree.