I couldn't resist doing a Google search on Wanky Doodle; no rubber aids by that name (alas) but I did come up with this:

Wanky Doodle went to town
Intent on masturbation
Stuck his member in a hole
And called it fornication

Wanky Doodle keep it up
Wanky Doodle dandy
Mind the tissues and the oil
And keep your fingers handy