The old cowboy, who had just started to read his book, replied to the total stranger, “What would you want to talk about?”

“Oh, I don’t know,” said the atheist. “How about why there is no God, or no Heaven or Hell, or no life after death?” as he smiled smugly.

“Okay,” he said. “Those could be interesting topics but let me ask you a question first. A horse, a cow, and a deer all eat the same stuff – grass. Yet a deer excretes little pellets, while a cow turns out a flat patty, but a horse produces clumps. Why do you suppose that is?”

The atheist, visibly surprised by the old cowboy's intelligence, thinks about it and says, “Hmmm, I have no idea.”

To which the cowboy replies, “Do you really feel qualified to discuss God, Heaven and Hell, or life after death, when you don’t know crap?”