My niece posted this on my Facebook wall and my bad Catholic self was momentarily ever so slightly offended. On one level it seems like a blatant specimen of anti-Catholic bigotry. But something happens in the course of the number. I’m tempted to say it redeems itself by being funny-as-shit. But I think it goes beyond that. As can happen with satire, there actually seems to arise an affection for the subject of the satire.
It also provides an opportunity. As Socrates attended a production of The Clouds and stood up so the audience could compare the real man with the parody, so you can watch Monty Python’s number and then go and read Humanae Vitae to see for yourself how wide the gap is.
I don't agree that it's funny, but I do agree that it seems to have an affection for its subject.
Funny may not be the right adjective. Uplifting? Buoyant? Joyful?
I almost believe that it becomes a satire before the fact on the people that will later reference it in arguments against the church.