I thought it was a joke:
The Mystic, the Doubter, the Pope and the Dumb Ox walk into a bar...
Well, when you consider that the punch line is "eating his body and drinking his blood," followed by an entire catechism and years of study backed by stern admonishments to convince you that "Corpus Christi" ISN'T about cannibalism, vampirism or black magic...
... a lot of people DO think it's a joke.
But NOT funny.
...Martin Luther ducks.