A group of hunters gathered in the woods..

A group of hunters gathered around the campfire after a long, hard day in the woods. *"3"*, said one of the hunters, and the rest laughed.
*"8"*, another said, and they laughed even more.
Now, for one of the hunters, these numbers weren't very fun. He asks, *"Why is this fun?"*. The hunters look at each other, and the leader explained, *"Well, you see son, instead of having to say the jokes to each other we've assigned* numbers *to them."* He looks at the hunter and says, *"Why don't try one?"*
The young hunter thinks for a moment, and then he says; *"42"*.
And this time, the hunters burst out in an explosion of laughter, som even falling to the ground.
Puzzled, the young one asks, *"Tell me, tell me, why was this fun?"*
The leader dries his tears with his hand, and says;
*"We hadn't heard that one before."*