This young beautiful woman was on a flight and this guy was seated beside her. He looks at her and says, "I've heard that carrying on a conversation will make the flight go faster."
The young beautiful woman looks at him and says, "Okay."
So, he looks over to her and says, "Well, what would you like to talk about?"
The young beautiful woman looks at him and says, "How about nuclear physics?"
He looks at her perplexed for a minute and says, "Wow, nuclear physics huh? That's such a deep subject. So, what about nuclear physics?"
"Well," the beautiful young woman starts, "it's like this. A rabbit eats grass, a horse eats grass, and a cow eats grass. Yet, when a rabbit poops, it poops pellets, and when a horse poops, it poops round dry clumps, and when a cow poops, it's poop is moist and layery. Why?"
The guy looks at her confused and says, "Well, I don't know."
The beautiful young woman looks at him and says, "Well, if you don't know shit, why do you want to talk about nuclear physics?"