Because - oh shut up laughing, you two - because they've just been turned down by girls they asked to the ball!
J. K. RowlingYet, sadly, accidental rudeness occurs alarmingly often. Best to say nothing at all, my dear man.
J. K. RowlingProfessor Snape was forcing them to research antidotes. They took this one seriously, as he had hinted that he might be poisoning one of them before Christmas to see if their antidote worked.
J. K. Rowling