Sherlock hums concedingly. "Be even more insufferable than he already is."

He can't imagine another person like him either. Mostly as they'd despise one another, he expects. Not by default, but somewhere along the line the acuteness of the empathy would become unbearable. It's for his own comfort that Sherlock says he wouldn't wish a brain like his on even his worst enemy. He already feels too much, and none of that is right by most people's standards either.

"Normal, I expect. Your sister's not like you either." They've already discussed that, but even if they hadn't, Sherlock would know. "Obviously. Nobody is."