New guy enters (prison/army/navy/marine corps). Some days later in the mess hall, somebody stands up and says, "#17".

Everybody laughs uproariously!

Newbie asks an old-timer what that's about.

Old-Timer says, "We've heard all the jokes so many times that we've numbered them all."

New guy waits a few weeks and then says, "#17!".

Nobody laughs and newguy is mortified. Asks old-timer what happened.

Old-timer says, "Some folks can tell a joke and some folks can't!"
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But wait, there's MORE!