There is a playroom in my house, in which the kids can make all the mess they want, and I don't go there and get upset. In it, there's a pool table for the kids, shelves for toys and games, and a love seat with 2 sofas for them to use. The sofa set is cheap, covered in sturdy brown fabric, and will take sitting, bouncing, wrestling, whatever. But no dogs on my furniture.
This dog is not sitting on a sofa.
He knows it is not permitted for any reason.
See? His front feet are on the floor. He just fell over onto the sofa. He isn't really sitting there.
God help him if he sits on the white furniture in my living room. He'll learn how nasty it can be to live on the porch, even an enclosed porch.