I have the feeling I imparted this version to MC lang syne, but anyway--
Do your balls hang low?
Can you swing them to and fro?
Can you tie them oin a knot,
Can you tie them in a bow?
Can you swing them to the ceiling
With that free and easy feeling?
Did you ever catch your ballocks
In a rat-trap, oh?
- Learned in the Royal Navy, 1952, from a public school boy.