It's hard to find jokes that are clean these days but, here's one where not a dirty word is used:

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 a son
of a beech nor a son of a birch. It is, however, the best piece of ash I
have ever put my pecker in."

 

It is a bit... well... lame.

bryan

 

i like cheese