Dave,

Thats my all time favorite. Written by W S Gilbert of Gilbert and Sullivan. But I believe rhat the correct line is "There once was a man from St. Bees"

Said the Physicain to his patient named Jacues,

"Can you do it while lacking a cock?",

"Its not as hard as all that,

I use a ball bat,"

"Its called hickory, dickery, Doc"

Don