Sirius held up a finger to stop Remus talking. "That is a lie," he said. "There are many people who actually take notes in History of Magic, and some of them owe me. I'm pretty sure you hide my socks in the first place. And I am certain that I can train Peter to stall birds when I need to get away. You are decidedly not indispensable, Moony."
Then he shot an impish grin of his own at the other boy and said, "Although I must admit that I can think of no one better to drink hot cocoa with. It's the way you act like it's as good as sex or something."