"Why?" Why should Seong be surprised that Matthias hungers for him? For his companionship? Hasn't he shown that already? That he can't get enough of Seong? Well, they're still new to each other, so Matthias supposes maybe there's some doubt whether that passion will remain. Even Matthias isn't sure how long it might last. Real fire like this can seldom be sustained. But Matthias is one hell of an actor.

For now, though, at least for now, it's all real.

"Don't you know you're my favorite?" His favorite person? His favorite dessert?