This guy walks into a bar for the first time, and he's sitting around drinking

This guy walks into a bar for the first time, and he's sitting around
drinking. Some of the old timers are telling jokes. One of them says
"Seventeen" and the other old timers all roar with laughter. A little later,
another of 'em says "Thirty-Two" and again, they all laugh and holler. Well,
the new guy can't figure out what's going on, so he asks one of the locals
next to him "What're these old-timers doin'?" The local says "Well, they've
been hangin' around together so long they all know all the same jokes, so to
save extra talkin' they've given 'em all numbers." The new fellow says
"That's mighty clever! I think I'll try that." So he stands up and says in
a loud voice "Nineteen!" Silence; everybody just looks at him, but nobody
laughs. Embarrassed, he sits down again, and asks the local fellow "What
happened? Why didn't anyone laugh?" The local says "Well, son, ya just
didn't tell it right..."