No privacy
Many cat owners are familiar with this scenario, in which their cats use the toilet as a hiding place for other things (such as food or water bowls). If there’s a gap beneath your door, your kitty will find a way to stick its paw underneath it! This is how cats check out what’s going on in the room.
They’ll also want to make sure you’re okay in there. Cats typically put their paws beneath the door and scrabble about looking for anything. This one was perfectly satisfied just lounging around!