"I guarantee you'll never need any of this stuff in your life." It was easy, of course, for Sirius to talk like that. Just as with many other things, studying came easily to him. He had excellent grades without trying hard and he didn't care much either, aside from how his parents hated that he was doing well. Admittedly, sometimes a nice bonus.

Not nice enough to waste any more time doing this stuff than necessary. "We could go outside. Come on, it will be fun." Because clearly what Remus needed was fun. "You need fresh air. I'm worried for you, Moony!"