Smart Blonde joke

[VetteVet]

Subject: FW: humor: Know your sh!t>
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>A guy gets on a plane and finds himself seated next to a cute blonde. He immediately turns to her and makes his move.
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>"You know," he says,"I've heard that flights will go quicker if you strike up a conversation with your fellow passenger.
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>So let's talk."
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>The blonde, who had just opened her book, closes it slowly and says to the guy, "What would you like to discuss?"
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>"Oh, I don't know,"says the guy. "How about nuclear power?"
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>"OK," says the blonde. "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?"
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>The guy is dumbfounded. Finally he replies, "I haven't the slightest idea."
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> "So tell me," says the blonde, "How is it that you feel qualified to discuss nuclear power when you don't know sh!t