[ He looks over at her when she touches his face, calm. He is incredibly careful, actually. Severus is well aware he can't regenerate. Most everyone can't regenerate, and they live their lives accordingly; he understands her perception is skewed. Probably because of how uncareful she is. It's something he accepts. ]

People become jaded with time. Desensitized from overexposure. It's just how we are; we'd all go mad without the ability to adapt that way.

[ She would, too. Death over and over could easily drive her to insanity. Maybe there's something built-in keeping her from it. ]

I don't know. Giving a damn, maybe.