Hi! Doree (the author of the article) here. I have, in fact, read Stephenie Meyer's books, and maybe I misunderstood the whole reasoning behind why they couldn't have sex. I was under the impression that he had trained himself to control his desires, to some extent, around her, and that if they had sex, yes he could hurt her, but there was always the chance he might bite her if things got too passionate. But maybe I misunderstood that! Anyway, just wanted to clear that up.

DS.