"Huh." Kirk sat back, knowing that look on Jim's face. "Doesn't it get... weird?" He gestured a little towards his temple, "Having someone in your head all the time?" Sure, he had some small resonance with Spock as well, but it was shielded specifically against all of that.

The idea, at least to him, was a little on the side of terrifying. He liked having at least one place he could be alone.