That's because alot of america are Creationists/Mormon/Scientologists/Aethiest
So when you ask which came first, chicken or the egg, you would get. . .
Creationists: Chicken, for god made it.
Mormon: God.
Scientologist: The chickens were brought to earth by Xenu 75 million years ago! Stacked around volcanoes and blown up with Hydrogen bombs! Look at KFC's colonel sanders, it is L.Ron Hubbard with a beard on! So on earth, neither the chicken or the egg came first, but the Volcano!
Meanwhile the Aethiest views them all with a sceptisism, exept the scientologist who he laughs at. The scientologists proceeds to sue him.