low blow
"And what's more," Hagrid said loudly, "all that Muggle talk about virgins is a load of codswallop, right? Don't believe a word of it. Just because a unicorn'll come to you don't mean that you're a virgin. Unless you want to be. So get your sugar lumps and let's not hear any more of that rubbish."
"Potter is a virgin, Potter is a virgin," Malfoy whispered.
Hermione spun to face him, wand drawn. "Accio honey!"
"Oh, fine," Malfoy said, looking down his nose. "So the Mudblood's ruined my trousers. So what?"
"Don't ask me. Ask those unicorns coming this way."
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