It is hard to find a joke today without a dirty word or two in it, but here is one:
Two tall trees, a birch and a beech, are growing in the woods. A small tree begins to grow between them, and the beech says to the birch, "Is that a son of a beech or a son of a birch?" The birch says he cannot tell. Just then a woodpecker, lands on the sapling. The birch says, "woodpecker, you are a tree expert. Can you tell if that is a son of a beech or a son of a birch?" The woodpecker takes a taste of the small tree. He replies, "It is neither son of a beech nor son of a birch. "It is however, the best piece of ash I have ever put my pecker in"
Wipe that smile off of your face...