Joe is walking along a dark street at night when he hears a lot of laughter and shouting from an Irish bar across the road.
Joe thinks, "Hmm...never been in an Irish bar before and I am bored and lonely. I'll go check it out."
In he walks, amidst hoots of laughter. He looks up at a stage in the center of the room and sees a man going to the microphone.
He taps the microphone twice and says "42". Everyone bursts out laughing and he walks off the stage.
Another man comes up and yells "68!" The crowd laughs louder still!
A third man walks up and shouts "12!!"
Joe is quite confused by now so he finds the manager and asks, "Why does everyone laugh when they are only calling out numbers?"
"Well," says the Manager, "we got tired of saying the same jokes over and over again so we assigned them numbers so each number called out is a joke."
"Ohh," said Joe. "Am I allowed a go then?"
"Sure!" the manager exclaimed, So up on to the stage went Joe and yelled at the top of his voice "168".
The patrons laughed so loudly the room shook. They carried him off the stage and bought him a few drinks.
After that, he went to the manager and asked, "Why was my joke so funny?"
The manager was still chuckling but he said, "Well, they haven't heard that one before!!"