Another parody is one I came across when studying philosophy in New Zealand in the early 1970s. It was a detailed synopsis of St Anselm's two Ontological Arguments for the existence of God. I don't know where I've put the purple-roneo copy I had and I can only remember the beginning and (sort of) the chorus:

Once a jolly friar found himself an argument,
And he couldn't get it out of his mind,
He thought that he could prove the existence of the Deity
Just from the way that the words are defined.

Thus spake Saint Anselm, thus spake Saint Anselm,
Thus spake Saint Anselm with weighty intent,
That's what he said in his proof so ontological,
If only we could understand what the hell he meant.