Barack Obama was seated next to a little girl on an airplane 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 Obama, 'What would you like to talk about?'

'Oh, I don't know,' said Obama. 'How about What Changes I Should Make To America ?' and he smiles.

'OK, ' she said. '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 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?'

Obama, visibly surprised by the little girl's intelligence, thinks about it and says, 'Hmmm, I have no idea.'

To which the little girl replies, 'Do you really feel qualified to change America when you don't know shit ?