In a conversation thread found on Pottermore, the topic of wizards pooping came up. Yes we’re serious.
JK explained that wizards didn’t have plumbing until the 18th century (which they copied from muggle!) and before then they would just literally go to the toilet in their pants.
“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,” JK said.
“Relieved themselves wherever they stood, and vanished the evidence”?!
Now can someone plz perform an obliviate spell on us so we can pretend we never knew this?