That little head bonk makes his lips twitch, like his face wants to smile despite itself. "I know," he says, and it's quiet, but fond. He has managed to absorb the fact that B, for whatever reason, really wouldn't mind. It still doesn't mean he doesn't want to give B the better version of himself, if he can. He doesn't want to be the guy who gets sick all the time. Who can't help out. He hated that. He'd rather feel guilty and undeserving for a body that can at least pull its own weight.

And he does like being big and strong and healthy. It's selfish, but he does. Of course he does.

"But this way I can keep up with you." At least half a dumb joke, but a little bit the truth, too.