If you didn’t smell so appallingly luscious, he might not have bothered. But when I defended you… well, that made it a lot worse. He’s not used to being thwarted, no matter how insignificant the object. He thinks of himself as a hunter and nothing else. His existence is consumed with tracking, and a challenge is all he asks of life. Suddenly we’ve presented him with a beautiful challenge — a large clan of strong fighters all bent on protecting the one vulnerable element. You wouldn’t believe how euphoric he is now. It’s his favorite game, and we’ve just made it his most exciting game ever.
Edward Cullen, Twilight, Chapter 19, p.397