If anything, you've already been in detention for that wanking business during summer. I'm guessing you've also been in detention for some other nonsense that I don't bother to keep up to date with. And the High Inquisitor is not going to care about the love lives of students. He's just here because there's been a lot of rule-breaking, according to him.

You've already been punished for what you did. He can't exactly punish you again. I think he'll just be waiting for you to slip up, and then he'll dish out double on you.