In the beginning, there were only wind instruments in the orchestra.
Then, they noticed that many of the people were too stupid to play wind instruments, so they gave them large boxes with wires strapped across them.
These people were known as "strings". Then they noticed that some people were too dumb to play strings, so they were given two sticks and were told to hit whatever they wanted.
These people were known as "percussionists". Finally, they noticed that one percussionist was so dumb, he couldn’t even do that, so they took away one of his sticks and told him to go stand in front of everybody. And that was the birth of the first conductor.