The boy plays petulance well. Steve sighed faintly, reaching up to stroke a hand through TJ's hair (metal under synthetic skin, but the other has yet to notice, so it's all well and good). He can't feel it, not like he could with his real hand, just the faint pressure that comes from the contact. It's an apt metaphor for what this is.

"Why? I thought you didn't like people staying too long."