There was a faint smile, nodding, "Interesting's a good word for it." He shrugged, "Sometimes we drive each other crazy, but we've also saved each other's lives too often to count, he thinks he's indestructible and he'd probably say the same thing about me."
Another almost-there smile, shaking his head, "We kind of dread the day we're not giving each other stitches at the kitchen table, since it won't mean we've gotten that good at what we do, it'll mean one or both of us is dead."