"Do I?" he counters, brow arching. Rex figures she's just teasing, but what if she's not? What if this is... flirting? He can't really tell either way-- he's never been good at navigating casual interaction beyond the basics. So he just glances away with a slight smile on his face, then shrugs one shoulder as he considers how comfortable he is-- or isn't-- in this weather. "A little, but I'm-- I've always been sensitive to the cold." Well, not always. Just after his accident. That half-smile broadens to something a little less awkward and a little more charming when he looks back at her. "It's what I get for being from California." Not that Palo Alto never got cold, but most people associate the whole state with beach weather, so he might as well play it up.

"I'm D--" No, Dr. Lewis is too formal. "Rex." He leans down some and pulls one hand out of his pocket, offering it to Bonnie. "Pleasure to meet you."