Cats of course, want nothing more than to go into rooms they are not allowed into. Open the door to a cat-free zone and they're in faster than lightning that's been soaked in muttonbird oil for three weeks. If you leave the door open, belike they'll saunter out, leaving the hayfever/catfur allergy sufferer to cough and sneeze at the hair that doesn't follow them out.
Clare was all snuggly tucked up with a fur-covered hot-water bottle. Pink fur as it happens, but in the dark all fur is grey. She discovered that the door had been less than well closed and during the course of the night a kitty took a tour of her bed, letting her know that a certain cat was in who should be out (she's a great favorite with the cats, and usually seems to have at least one with her, but that room is a cat-free zone). So she sleepily put out the protesting pussy, and scrambled back into bed. And to her horror sat on a cat.
Which - if she'd had the light on, she'd have seen had pink fur :-)