Not original, but an old favourite because of its sheer silliness:
Said the vicar of Old St Paul's "Concerning these cracks in the walls, would it be faster to use quick-dry plaster?" And the Bishop of Leicester said "Balls!"
The message came in bit by bit It was clear things had gone all to shit The chap on the wireless Was tapping out, tireless, Dit-dit-dit, dah-dah-dah, dit-dit-dit.
It's Monday: can't get out of bed. It's Tuesday: A gas bill that's red. It's Wednesday: a bruise. It's Thursday: blown fuse. It's Friday: Hooray! Still not dead!
A nod is as good as a wink To a blind horse. But pause now and think All this nodding and winking And unseemly blinking Could drive the poor creature to drink
A friend mailed me this one: There was a young lady of Niger who smiled as she rode on a tiger. They returned from the ride with the lady inside and the smile on the face of the tiger.