"You'd be surprised how often it happens. A lot of them have their parents pay their way and just glide by." He shrugged, trying to not become annoyed by the phenomenon. Usually just talking about the especially lazy students could work him into a very contained, agitated lather.
"I am," he nodded. And then, before he could make a move, she was up and fetching his plate. "I'l do dishes," he offered pleasantly. "I wouldn't mind." He rolled up his sleeves to his elbow as if to show how serious he was about it.