Someone posted this on the Cat a long time ago - I'm sorry I don't remember who - and I have enjoyed it ever since:

An accident happened to my brother Jim
When somebody threw a tomato at him
Tomatoes are juicy and don't hurt the skin
But this one was specially packed in a tin

Also here's one Mister says now and then; I think he said an old friend of his made it up, or claimed to:

A bear sleeps in a bearskin, I suppose
I slept in my bare skin and damn near froze