"That was fast." Sirius noted that, frowning. He wondered if he'd been fast as well. It hadn't seemed to take long! How quickly had the Sorting Hat just decided to ruin his life? And now there was Severus. He watched him, self-consciously running a hand through his own hair to brush it back from his face. He didn't actually want James making fun of his hair too. "He's half-blood! They are different."

He assumed that was why he didn't seem washed, anyway. Honestly, Sirius wasn't sure. But he wanted to defend his friend.