Okay -- this joke is terribly politically incorrect, and I offer it as an example of humor that should never be repeated, lest people develop a capability to not take themselves too seriously.

A cowboy, an Indian and a Muslum were riding in a train across the plains. The Indian gazed out the window and sadly sighed, "Once my people were many, today they are few."

Sitting across from him, the Muslum smirked. "Once my people were few, and now we are many."

The cowboy, who had been stretched out in his seat with his stetson pulled down over his eyes, tippped up the brim of his hat, turned to the Muslum and drawled --

"That's 'cause we ain't played cowboys and Muslums yet."

Disclaimer: genocide of Native Americans is wrong, most Muslums aren't terrorists, and not all cowboys drawl. And no animals were harmed in the telling of this joke.