Yasser Arafat just emailed me this very funny joke. Of course, in his version it was about two blonde jews, but I changed it around just a bit.

There were two godless blonde infidel dogs working for the city council. One would dig a hole, the other would follow behind him and fill the hole in. They worked furiously all day without rest, one godless blonde infidel digging a hole, the other godless blonde infidel dog filling it in again.
An onlooker was amazed at their hard work, but couldn't understand what they were doing. So he asked the hole digger, "I appreciate the effort you are putting into your work, but what's the story? You dig a hole and your partner follows right behind and fills it up again."
The hole digger wiped his brow and sighed, "Well, normally we are a three-man team, but the other godless blonde infidel dog who plants the trees is out sick today."