James Thurber once said, "Cats sit fat and walk thin." Indeed they do, unless they're a fat cat and then they don't walk, they sway and waddle. We've had a few cats like that, but most members of our present kitty family are lithe and lean. It seems to be the inside ones that have issues with their bellies.
Max thinks he would like to be an inside cat. He's no doubt tired of being chased by Boo and he knows we won't let Boo in at the same time. He also knows when he's in the house, chances are pretty good that he's going to get some of the good kitty food (Special Kitty in the pouch) that we treat our otherwise dry-cat-food-eating felines to, from time to time.
But the biggest reason Max enjoys being let in is because being a lap cat at heart, he's in heaven with not one, but two obliging laps to choose from. The scritches under the chin are nothing to sneeze at either.
As I write this, Max is doing his house cat imitation. With no laps available at the moment because Romie has gone to bed and I'm on the laptop, he's found another place to stretch out, proving that not only do cats walk thin, they sleep thin, too.