Many strong and sturdy customers tried to squeeze a drop more after the bartender. But no one was able to win the challenge.
Then one evening, a lean man walked over and accepted the challenge. He was able to squeeze out 6 drops after the bartender had squeezed the lemon.
After the man had pocketed his prize, the bartender asked him.” How were you able to do that after many people stronger than you had tried and failed?”
The man replied,” I work for the Income Tax Department (it is called the IRS in the US).”