Alright, I know that this might be a bit of a serious topic to discuss around the "water cooler", but bear with me. I'm a bit of a history nut, and a big pet peeve of mine are the pseudo-historical myths we think we all "know" about history but usually end up being totally wrong (like "People in the Middle Ages didn't wash" or "People used to not get older than 40 or 50."). There's a number of me…