Oh! He got an upgrade from his dream, wish, whatever it was. "Immunologist. Meaning you can find out what people are immune to?" The first thing he thought of was Sam and his immunity to the demon blood and then there was why he caught that one bug and Sam saying it must be he was a jerk.
Dean then got a wicked little grin on his face. And score again, he got himself a wicked little doctor. "Well, sweetheart, as long as you aren't gonn shove any metal object in me in places they don't belong, you can be in control all you want."
Okay, so some of the lines were his. He walked with her, "It's okay, you can kiss them all better, right?" He smiled. "Name is Dean by the way."