Susan: Because she's your cat.
Me: I don't sit in the fireplace.
Susan: Only because you don't fit.
Over the course of my lifetime, I've had 14 cats. Stardust is the only one of them who has taken to wandering into the fireplace. She does it rather regularly. Tonight she sat there for about 10 to 15 minutes, looking around and sniffing everything before casually wandering back out again. Are there other cats who behave this way?