Canvas Bags by Tim Minchin (rated G)
(Great, now I have given myself the earworm, as I do *every time* I hear it.)
I love Tim so much. He comes in both serious and silly, but always worth watching. Look at his other vids over there. Buy his dvds. Enjoy.
If you are of age and not easily offended over extremist religion, try his story of anal sex and god: