Mm, I love me a snarky, grumpy, needy Snape. This line just gets me:
Snape sighed. "You're an idiot, and I'm too damn old and cranky to be interested in having it off on the ground next to a grave." When Potter opened his mouth to object, he belatedly added, "For a second time."
Hahaha.
Love the title, too. And I agree with alisanne, Harry's nipple obsession is sweet. Not that I can blame him.