So I read a thing yesterday about a guy called John Harington who invented and wrote a sort of patent for an early version of the toilet (long before Thomas Crapper) in Elizabethan times, which may be where "the John" came from. He seemed to be a sort of give-anything-a-go sort of fellow and as well as being a bit of an engineer also wrote poetry. One poem he wrote was a humorous thing about sitting in the toilet in which he alluded to members of the Elizabethan court as being the pieces of shit flying down the privy's passages, which got him into hot water.
I read somewhere.. that if it wasnt for that prick Martin Luther.. the whole place would be athiests by now probably . The catholics were well on their way to not giving a tommy crapper about the whole rigmarole and then he came along and made everyone start pretending to be mad holy again