"Leave it to my brother to manage to erase a very good and useful word from the dictionary, a word he doesn't like of course," he said with a smile. "I make no promises, but I'll try not to use it, if only to stop seeing these smiles."
He knew that sometimes 'letting' had little to do with reality. "You wouldn't have to say anything. Sirius would have known that things in Gryffindors were different than at home. He would have adjusted accordingly. I'm sure he wanted, at least in large part, or he wouldn't have been sorted there."
He shook his head with an innocent smile on his face. "I have no idea, Professor." His expression changed, frowning. "I don't understand. How can that have lead to your decision? Although I can see why he wouldn't bring it up." Sirius had to feel pretty shitty if he'd caused his best friend to be a virgin at twenty-eight.