In King Henry VIII’s pleasure palace, Hampton Court, there was no escaping class—not even in the loo. The King, of course, had a luxurious place to squat. According to the Hampton Court Palace website, he and other royals sat atop a padded chair "covered in sheepskin, black velvet, and ribbons" lofted above a pewter chamber pot. This toilet was private, located in a so-called "stool room" that was attended to by a high-ranking courtier known as the Groom of the Stool. It was a privileged, well-respected gig to handle the monarch's waste. (Apparently the groom would even take notes on...