You know who you are!

Someone stealing from you? but you don't know how they're getting in?

I was shown some items from a carrier bag, not really my sort of thing - hats with bears on them and teddy bears, one of the bears was fairly heavy as it was stuffed with beans. Then I was shown a PAIR of slippers from and unknown location. I was sure it was some kind of joke, I looked at the person showing me the stolen items to see if there was an imminent punch line. There was not, it was a fact, along with all the other hats and toys their cat had dragged one sparkly slipper in through the cat flap then gone back for the other one.