At my mother's there was a "no dogs on the furniture rule". A few years before I moved out she had a foster fail called Ayk. He was so energetic but always friendly and everyone loved him but he tried to stretch this rule as far as possible.
This is an example:

And some of you may say: that's just a coincidence he's in touch with the seat. But I can assure you: it's calculated. As soon as he had established contact he started inching forward, slowly but steadily.
On the couch he usually started with his butt, just touching and suddenly he sat next to you, acting totally normal.
It was tolerated way too often because it was hilarious to watch him and see how his little brain came up with a "walkaround" for the rule. He was a very good boy!
