When in doubt, let the animals do the thinking.
Great fleas have little fleas
Upon their back to bite ‘em;
And little fleas have lesser fleas
And so, ad infinitum.
And great fleas, themselves, in turn
Have greater fleas to go on;
While these, again, have greater still,
And greater still, and so on.
A verse written by Augustus de Morgan, based on a poem by Jonathan Swift