So, Nat'ralists observe, a Flea Hath smaller Fleas that on him prey, And these have smaller yet to bite 'em, And so proceed ad infinitum https://en.wikip

So, Nat'ralists observe, a Flea Hath smaller Fleas that on him prey, And these have smaller yet to bite 'em, And so proceed ad infinitum https://en.wikipedia.org/wiki/Siphonaptera_(poem) https://en.wikipedia.org/wiki/Siphonaptera_(poem)