I bought a cat bed, a special self-heating cat bed (it has a layer of mylar inside). I was afraid they wouldn’t use it and it would be a waste of money but here (the grey one is Buddy – you can see from this shot why I frequently say to him, “Who is my great big bear of kitty? Who is the biggest kitty of all time?? Buddy!”):
The pattern clashes with the rug, but I have since tried the other side, which is all black, and they sleep on that side, too.
My cat thinks he owns the place and refuses to use the nice kitty bed I bought for him. He prefers my pillow and I annoy him because I want to use it for sleeping.