"Just wanted to see if I could tell her to shut it NOW," Harry defended himself, and then wrinkled his nose. "Eeewww, mate *I* don't want to smell them! Quit it!"
Harry pushed back and a moment later, they WERE on the floor and grappling as they'd done since they were small children. Ron was bigger, and theoretically stronger, but Harry was wiry and crafty, so it was an even match.