Remus 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. RowlingI had a dream about a motorcycle," said Harry, remembering suddenly. "It was flying." Uncle Vernon nearly crashed into the car in front. He turned right around in his seat and yelled at Harry, his face like a gigantic beet with a mustache: "MOTORCYCLES DON'T FLY!" Dudley and Piers sniggered. "I know they don't," said Harry. "It was only a dream.
J. K. Rowling