There is this cowboy and at the saloon he is mostly popular with the clientele because he tells so many good jokes. But a visiting muleskinner resents that so many of them 'dumb muleskinner jokes' are directed at his profession.
"Please tell a joke about someone besides muleskinners." he asks.
"Sure, pardner." says the cowboy. "Who would you like me to make the next joke about?"
"Well, okay, make the next one about stage drivers. And make it good!"
"Okay, okay, keep your shirt on. There's these two stage drivers, see?"
"Yeah?"
"And they're skinning this mule..."