Dude, Robin has some serious abs considering he doesn't have much (if any) in the pecks department. Though looking at the face, I'm thinkin he's thinkin the same thing lol. You'd think bruce could afford some fake pecks to put on his costume too.
Though I love the look on his face. He could be looking at someone coming at him, watching a crime happening that he thought too stupid to happen, or just coming aware that someone farted around him.