It was Tim's first day at the job, and on the first day he heard someone yell out the number "63," and everyone begin to laugh. Tim was puzzled. Later, someone called out, "48," and again everyone laughed. This continued for quite some time, until Tim asked his new co-worker Frank what was going on.
Handing Tim a book, Frank replied, "We're so busy, we got this book of jokes. We've memorized them all, and to save time, we just yell out the number."
That night Tim went home and memorized the entire book. The next day, he confidently strode into the office and called out "37," only to be met with blank stares from his co-workers. Confused, he sat down at his desk.
Later, he heard someone else call out the number, "67," and the entire office broke into hysterics. Emboldened, Tim yelled "88!" but again, everyone looked at him strangely. He resumed work.
At lunch, he asked Frank, "I don't get it. Why didn't anybody laugh when I yelled out a number?"
Frank looked at him and shrugged, "You know how it is. There are just some people who can't tell a joke."