OK Mrzzy - "My fave of the Monty Python litany was the One-Eyed Trouser Snake."

I've got a little animal, I suppose you'd call it a pet
But if there's something wrong with it, I don't have to call the vet.
He goes everywhere that I go, whether sleeping or awake -
God help me if I ever lost my one eyed trouser snake!

Attributed to Barry "Scott" McKenzie, on the Private Eye flexi-disc "The Abominable Radio Gnome", December 1967.