My Napoleon does this if I sit in the floor. I have also been told it is a dominance thing. I believe it is too. If Napoleon does it and I get up, he will follow me around and kinda lean on me and push. I have been told not to sit in the floor. When he does this, I will get up immediately and get in a chair and ignore him. Sometimes this works, sometimes it doesn't.
Patience is the key!
Good Luck
Debbie