A man is driving down the road and breaks down near a monastery. He goes to the monastery, knocks on the door, and says, My car broke down. Do you think I could stay the night? The monks graciously accept him, feed him dinner, and even fix his car.

As the man tries to fall asleep, he hears a strange sound. The next morning, he asks the monks what the sound was, but they say, We can’t tell you.

You’re not a monk.

The man is disappointed but thanks them anyway and goes about his merry way. Some years later, the same man breaks down in front of the same monastery.

The monks again accept him, feed him, and even fix his car.

That night, he hears the same strange noise that he had heard years earlier.

The next morning, he asks what it is, but the monks reply, We can’t tell you.
You’re not a monk.

More : http://www.desihotmasala.com/2008/11/you-are-not-monk-hillarious-joke-must.html