A politician was seated next to a little girl on an plane when he turned to her and said.

Let's talk. I have heard that flights go faster if you talk to your fellow passengers.

The little girl, closed her book that she had just opened, said to the stranger.

What would you like to talk about?

Oh, I don't know,

said the politician,

How about global warming or universal health care?

He replied smugly.

Ok, 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 supposed that is?

The little girl asks.

The politician surprised by the little girl question, thinks about it and says.

Humm, I have no idea.

The girl replies

Do you really feal qualified to discuss global warming or universal health care when you don't know shit?