Indian and American !!!

*An American gets on a plane and finds himself seated next to an Indian. He immediately turns to the Indian and makes his move.
"You know what," says the American to the Indian, "I've heard that flights will go quicker if you strike up a conversation with your fellow passenger.So let's talk."
The Indian, who had just opened his book, closes it slowly and says to the American,"What would you like to discuss?"
"Oh, I don't know," says the American, smiling. " How about nuclear power? "
"OK," says the Indian. "That could be an interesting topic. But let me ask you a question first. A horse, a cow, and a deer all eat the same stuff grass. Yet the deer excretes little pellets, the cow turns out a flat patty and the horse produces muffins of dried poop.Why do you suppose that is?"
The American is dumbfounded. Finally he Replies, "I haven't the slightest idea."
"So tell me," says the Indian, "How is it that you feel qualified to discuss nuclear power when you don't know shit?"