let's talk

[MAJWIZ]

A man was seated next to a kid in an airplane.
The man turned to him and said, "let's talk".
KID: Ok, what do we talk about?
MAN: (making fun of the kid): How about nuclear power?
KID: Very interesting topic. But let me ask you a question.... Horse, Cow and Deer, all eat grass.
Yet the Deer excretes pellets, Cow flat potty and the horse clumps. Why is that?
MAN: Well, I don't really know.
KID: Do you really feel qualified enough to discuss nuclear issues when you don't know your ****???