OK, it's not a total hijack since others have interjected 'poetry'...but here's my favorite limerick (and Silver will attest that I've known it for years)

A canner exceedingly canny
One morning remarked to his granny
A canner can can anything that he can
But a canner can't can a can, can he?

It makes total sense, which still amazes me 35 years after I first read it...