A stranger was seated next to a blonde on the airplane

A stranger was seated next to a blonde on the airplane when the
stranger 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 blonde, who had just opened her book, closed it slowly and said to
the stranger,
- 'What would you like to talk about?'
- 'Oh, I don't know, said the stranger. 'How about nuclear power?' 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?' The
stranger, visibly surprised by the blonde's intelligence, thinks about
it and says, - 'Hmmm, I have no idea....'
To which the blonde replies,
- 'Do you really feel qualified to discuss nuclear power when you
don't know shit?'