little girl on a plane

A Congressman was seated next to a little girl on the airplane leaving from Mobile, AL when the he turned to her and said, 'Let's talk. I've heard that flights go quicker if you strike up a conversation with your fellow passenger.'
The little girl, who had just opened her book, closed it slowly and said to the total stranger, 'What would you like to talk about?'

'Oh, I don't know,' said the congressman. 'How about global warming or universal health care', and he smiles smugly.
OK, ' she 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, and a horse produces clumps of dried grass. Why do you suppose that is?'
The California legislator, visibly surprised by the little girl's intelligence, thinks about it and says, 'Hmmm, I really have absolutely no idea.'
To which the little girl replies, "Well then.....Do you really feel qualified to discuss issues such as global warming or universal health care when you don't know shit?"
She quietly went about reading her book and was not bothered again!