"You were," said Jon, laughing, "bitten by a were-couch."
"A what?"
"A were-couch. It's like a werewolf, except you turn into a couch instead."
"How is that possible?"
"Well, you don't need to be literally bitten, I think you pricked your finger on a broken spring or something. That's why were-couches are rare--if you start thinking and acting like a wolf, you go out and bite people, but if you start thinking and acting like a couch, you just sit there, and couches can't move anyway. Unless you take on a half couch, half human, form anyway, like werewolves are supposed to."
"Is there a cure?"
"Yeah, wait for the moon to go down. But I think there's a better one...."