A Good Joke

Joke from email.

Guy gets on a plane and finds himself seated next to an attractive
brunette. He immediately turns to her and makes his move; “I’ve heard
that flights pass quicker if you strike up a conversation with your
fellow passenger, so let’s talk”
The brunette who had just opened her book, closes it and says; “What
would you like to discuss?”
“Oh I don’t know,” says the guy “how about nuclear power?”
“Well that could be interesting, but first let me ask you a question.
Horses, cows and deer all eat grass. Yet the deer excretes small
pellets, the horse muffin sized chunks and the cow big squishy pancakes.
How come?”
Dumbfounded the man replies; “I have absolutely no idea”

“I see” says the brunette, “So you feel qualified to talk about nuclear
power, but clearly you don’t know shit!!”