Miles arched a brow as Oliver explained Gryffindors to him. (He also disagreed, Gryffindors made rash decisions and he was grateful for that at times.) Arching a brow as Oliver gave him permission to go after any Gryffindor woman who wasn't the Ginny Weasley (which the idea made him slightly ill just thinking about it) he looked at his mate.
"Well I appreciate your support," he said, smirking, not sure if Oliver would still say that if he knew just who he was after.