Sherlock nodded. He knew that. He'd done quite a bit of research on sociopathy in his free time years before. The things he hated were things Moriarty could never give him. It was one of the main benefits to having him as a friend. Someone who understood him, someone who understood what it was like to be different in more ways than just intelligence. Jim was perfect as a companion in many ways.

And in just as many he was somewhat unnerving to keep in close company.