But when she was done with the books and the last movie came out, she created an interactive website Pottermore for fans who wanted to continue their magical adventure. For years, she has been posting backstories and facts about the wizarding world that we never know before.
Some facts have been enlightening - like Dumbledore being gay with Grindelwald. And others, well... others seem a little unnecessary.
Sharing the revelation on Twitter, Pottermore announced to its followers that there was a time when Hogwarts didn’t have toilets.
So what they do when they had to go? They went on the floor and used a spell to hide it.
"Hogwarts didn't always have bathrooms. Before adopting Muggle plumbing methods in the eighteenth century, witches and wizards simply relieved themselves wherever they stood, and vanished the evidence. #NationalTriviaDay."
It was such a big deal that it actually almost led to the entrance of the Chamber of Secrets being uncovered.
The Pottermore website explained it a little further:
“However, when Hogwarts’ plumbing became more elaborate in the eighteenth century (this was a rare instance of wizards copying Muggles, because hitherto they simply relieved themselves wherever they stood, and vanished the evidence), the entrance to the Chamber was threatened, being located on the site of a proposed bathroom. The presence in school at the time of a student called Corvinus Gaunt – direct descendant of Slytherin, and antecedent of Tom Riddle – explains how the simple trapdoor was secretly protected, so that those who knew how could still access the entrance to the Chamber even after newfangled plumbing had been placed on top of it.”
Naturally, fans are very grossed out.