So Audrey told the Doctor that her dress must have shrunk over the last year, because it didn't fit when she went to get ready for a wedding recently.
The Doctor said, "Dresses don't shrink just sitting in a closet. You probably put on a few pounds."
"That's just it, Doctor, I know I haven't gained a single pound since the last time I wore it."
"Well, then," said the Doctor, "You must have a case of Furniture Disease."
"What in the world is Furniture Disease?" asked Audrey.
Spoiler: