From Hampshire:

There once was a farmer who sat on a rick
A ranting and raving and waving his
Fist at some people who sat on his walls
A-teaching their children to play with their
Bowstrings and arrows and weapons of war
When along came a lady who looked like a
Decent young woman who walked like a duck
Who said she'd invented a new way to
Educate her children to read and to write
While down in the cowshed they were shovelling the
Contents of the cowshed from the back to the front
While the milkmaid was counting the hairs on her
Cows' fronts and cows' backs, that's the end of my song
And if you think it's dirty, you're ***** well wrong.

I learnt this from schoolfriends in about 1961!

Gwilym