&gt;Two blonde guys were working for the city works department. One would dig a
&gt;hole and the other would follow behind him and fill the hole in.
&gt;
&gt;
&gt; They worked up one side of the street, then down the other, then moved on
&gt; to the next street, working furiously all day without rest, one guy
&gt; digging a hole, the other guy filling it in again.
&gt;
&gt;
&gt; An onlooker was amazed at their hard work, but couldn't understand what
&gt; they were doing. So he asked the hole digger, "I'm impressed by the effort
&gt; you two are putting into your work, but I don't get it -- why do you dig a
&gt; hole, only to have your partner follow behind and fill it up again?"
&gt;
&gt;
&gt; The hole digger wiped his brow and sighed, "Well, I suppose it probably
&gt; looks odd because we're normally a three-man team. But today the guy who
&gt; plants the trees called in sick."