Yeah, see, he doesn't know that. And would probably be Very Upset if he did. Optimus is ... well. A bodyguard's charge is everything. Optimus is everything. He adores him -- cares for him. Probably beyond reason.

"You sure?"

He doesn't look convinced. His hand reaches out, resting on Optimus' forearm. He'll do whatever is needed of him, he just wants to make sure Optimus is all right with it.

"I trust you, Prime. I don't gotta say it. But if this is some kinda guilty personal trip, I'm comin'. No matter what."