Dick was just about to make a snot-assed comment back to Duo (even though he hadn't decided what it was yet) when Kisame added his two cents.
Dick hadn't been blushing before (he hadn't! Really!) but he started, then. "You're both assholes!" he said, embarrassed but laughing. "I'm not blushing!"
Shut up.
Then he followed Kisame out the door, waiting until Duo had gone first. "Funny how rule number one keeps changing," he said, smiling and flanking Duo unconsciously.
'Protect the smaller heroes' was always rule number one. Before all of the other rule number ones.