Whatever Cooper was expecting Stiles to say, it wasn't that. He blinks in surprise. "You think I'm a werewolf?"

He starts to laugh. It's one of those bubbling laughs that starts off small and then begins to grow. Before long, he's got his head thrown back, laughing at full volume, and other people on the tube are beginning to look at them. He wipes away a wayward tear leaking out of the corner of his eye and manages to squeak out an answer. "No, I am not one of those flea-bitten puppies."