Dear Drunken Ladies,
You were all expecting a trick: alas, an explanation was offered instead.
If you want a real demo, here's how to do it:
1. Find a man wearing a suit with deep trouser pockets.
2. Get him really tight .
3. Get yourself as tight as him.
4. Put your hand into one of his trouser pockets, as far as it will go.
5. When you've reached the bottom, pull it out (I'm talking about the pocket

)
6. Observe how it falls (the change

)
7. Spend some moments on reflection (e.g. "is there enough here for another drink?")
8. Refer to this experience 45 years later in a poem
Well ladies, it's as easy as that, unless you want me to .......
That's all for now: I thought I'd written a serious piece of poetry 'til you lot got involved
As aye,
yer Andrew.