(The little vampire) Vampire saliva is an anesthetic. It starts off as a joke, but after Rudolph licks Tony's finger and instantly stops the pain from his paper cut, it becomes a habit for Tony to say, "Rudolph, lick it better!" any time he gets a bump or scrape. So, what will happen when Tony burns the heck out of his tongue on hot coffee? originally on archiveofourown, published 2021, All due credit to the artwork, based on the animated 3D film, The little vampire.