Himself loves to be combed. In fact, he'd want me to comb him 24/7 if I was willing. I do comb him fairly often, but that leads to problems. First, he's an angora. His hair floats in the air at the best of times, and there's really no way to comb him without finding yourself in a cloud of long white cat hair that clings to your clothes and your eyelashes. And that leads to the second problem - I'm allergic to him. I love him. I don't love the sniffing, sneezing and watering eyes that happens when I comb him.
And so, sometimes, I let him do it himself.
Somehow, I don't think he minds.
Follow up from the vet visit: The vet suspected that he had a bladder infection, and gave him a shot that takes effect over three days. He seems to be doing better, but is still having moments of supreme crankiness. She also wonders if he might have arthritis in his hips, which would take an xray to confirm. If he does have arthritis, then she's got a number of treatments that we can discuss; but we're both hoping the shot will be all he needed.