G: Why are the birds so angry at the pigs?
Me: Because it's the name of the game.
G: But why are they so angry at the pigs?
Me: Because... the pigs stole their eggs and they're mad about that.
G: But why don't the Birds just say "Please give us our eggs back" And the Pigs say "I'm sorry, here you go" and the Birds say "I forgive you."
Me:...I don't know. That would be a much nicer thing to do. But then there wouldn't be a game.