The punishment of Prometheus (he was chained to a rock and had his eternally-regenerating liver torn out by an eagle every day) has always been a popular topic for Western artists, and why not; it's full of action poses and furious birds and gave everyone the chance to draw hands. A real win-win! And yet: Over time, folks got a little sloppy, and eventually, more often than not, Prometheus and the eagle looked like boyfriends…