If you have to explain it then it is not that good.
Your spinning me a yarn here !
Of course, there's , but here goes mine: ...and that, my liege, is how we know the Earth to be banana shaped. This new learning amazes me, Sir Bedevere. Explain again how sheep's bladders may be employed to prevent earthquakes.
Well a joke that isn't funny, but still is because it isn't. If you know what I mean. These are kind of much easier to remember.
Puns