Only one pair was still battling, apparently unaware of the new arrival. Harry saw Sirius duck Bellatrix's jet of red light: he was laughing at her. 'Come on, you can do better than that!' he yelled, his voice echoing around the cavernous room. The second jet of light hit him squarely in the chest. The laughter had not quite died from his face, but his eyes widened in shock.
J. K. RowlingRemus Lupin was supposed to be on the H.I.V. metaphor. It was someone who had been infected young, who suffered stigma, who had a fear of infecting others, who was terrified he would pass on his condition to his son. And it was a way of examining prejudice, unwarranted prejudice towards a group of people. And also, examining why people might become embittered when they're treated that unfairly.
J. K. RowlingAre you trying to weasel out of showing us any of this stuff?" said Zacharias Smith. "Here's an idea," said Ron loudly, "why don't you shut your mouth?" "Well, we've all turned up to learn from him, and now he's telling us he can't really do any of it," he said. "That's not what he said," said Fred Weasley. "Would you like us to clean out your ears for you?" inquired George, pulling a long and lethal-looking metal instrument from inside one of the Zonko's bags. "Or any part of your body, really, we're not fussy where we stick this," said Fred.
J. K. Rowling