Max

We have two dogs. One is very bright and the other isn't. Neither are allowed on the settee. The dim one never gets on the settee but the bright one waits until we have left the room and then climbs on, usually when we are both upstairs doing something.
But here's the funny bit. Because he knows that he shouldn't be on the settee, when he hears one of us coming down stairs he gets off and greets us at the bottom of the stairs wagging his tail as if nothing has happened. He hasn't yet figured out that I can tell where he's been by simply feeling if there is a warm spot on the cushion.
When he figures that one out then we have a major problem.