Because it meant his care was true, even if it hurt more. But Tony's not responding to that look or explaining himself, he's busy getting what he needs to treat L's back. It's going to hurt, it's going to hurt for a very long time. But they can work through it, can't they?

This time Lazarus isn't near death, for one, and Tony's been through.. a lot. For another. Shou requires a lot of reassurance as well, he's learned some patience there, and some impatience, but that won't help Lazarus. Nah, he's here to look after his brother. And right now a gentle hand and clean hair seem to be a better ticket than scolding.

"We will," He reaffirms, dumping water into L's hair then following up with shampoo. They'll have him back in a semi-normal state in no time. "I've got an idea or two."