"You know that I can't let you eat all that by yourself, right?" Judge not lest ye be judged. Also, it looks... oddly appealing in a disgusting sort of way. Xander gives Dawn the serious 'trust me, I'm a doctor' look.

"I mean, if you went into shock from ODing on glucose, I'd get all kinds of crap from Buffy. Plus your Cullen-y good looks and rapier-like wit would be lost to the world, and I firmly believe that it's my mission to stop tragedy like that. With great power comes great responsibility."