There were two blonde guys 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 guy digging a hole, the other guy
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 behind and fills it up again."

The hole digger wiped his brow and sighed, "Well, normally we are a
three-man team, but the guy who plants the trees is sick today."