Two guys (Guy A and Guy B) in prison for a long time. Guy A is a funny guy and tells jokes to the rest of their inmates all the time.
They all get together and decide that all these jokes take too long to tell, so they start numbering the jokes.
Guy A takes the lead and numbers the "A guy walks into a Bar..." Joke #1, the "Priest, rabbi and minister" Joke #2, the "Golf Joke" Joke #3, etc., etc. etc., all the way to Joke #99.
To save time, Guy A, starts telling the jokes by number, he yells out "Joke # 5", big laughs, then later shouts "Joke #60", huge laughs, and finally "Joke "84", uproarious laughs.
A week goes by, and Guy B decides it's his turn to tell some jokes.
Guy B: "Joke #5", dead silence.
Guy B: "Joke #60", crickets.
Guy B: "Joke #84, he knows it's a winner!, still no laughs.
Guy B to Guy A: what's wrong, you tell the Jokes and get all kinds of Laughs, I tell the Jokes and I get no laughs.
Guy A to Guy B: "Some guys know how to tell a Joke and some guys don't."