My roommate is Jewish so she doesn't know a lot of these things, so I get to enjoy telling her how wild this all is.
I explained to her Martin Luther's 200 page google doc callout post the other day. So I had to explain indulgences. An then I had to explain purgatory. (There's no "hell" in Judaism so this was an entirely foreign concept to her)
Guilting peasants into paying the church to get Grandma out of the backrooms is an incredibly ridiculous concept, so it was very funny to see her go "no way, that can't be real." Oh, it is very real, and you would not believe the Drama that resulted from it.