My doc asked me why you never see gazelles with arthritis. Because the lions have eaten them. We are living longer, and so, with that, comes "issues." And Nature thinks: you have done your job. You have two daughters. Your role is over. But it ain't. Right. So we deal with "aches" from time and again. Good point, doc! He was also an English major at one point! In the Middle Ages, we'd be dead.