Well, it is (what's so dang) Good Friday...
I frequently find myself humming or singing this song when things in my life seem to be going in the dumpster! Great tune, funny movie. ?
I think it is easier to be cheerful and singing when you don't have big nails in your wrists and feet and bleeding with vultures circling overhead.
Its Juxtaposition... and really funny lol
As the movie "The Life of Brian" already had bull frontal male nudity earlier in the movite, I think they coudl have had everyoen in the crucifiction scene naked (which would have even ben historically accurate), like the Roman really crucified persons. The loin cloths in paintings and movies are pretty much religious revisionism and censorship.
Still, this ws a pretty cute ending tothe movie.