"Why do I have to study Occlu -- thing?" [Harry] blurted out.[br]"Because the headmaster thinks it is a good idea," said Snape smoothly...[br]"Who's going to be teaching me?"[br]Snape raised an eyebrow.[br]"I am," he said.
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"The Leaky Song" by Brad Mehlenbacher of Draco and the Malfoys