Harry had to fight down a laugh.
This was one of those uncomfortable things Luna often said and which made Harry feel a squirming mixture of pity and embarrassment.
People ask me if there are going to be stories of Harry Potter as an adult. Frankly, if I wanted to, I could keep writing stories until Harry is a senior citizen, but I don't know how many people would actually want to read about a 65 year old Harry still at Hogwarts playing bingo with Ron and Hermione.
He pushed the door ajar and peered inside – and a horrible scene met his eyes. Snape and Filch were inside, alone. Snape was holding his robes above his knees.
Oh well... I'd just been thinking, if you had died, you'd have been welcome to share my toilet.
Have you any idea how much tyrants fear the people they oppress?