Ever since Kai was a puppy, he's had free reign of all furniture in the house. He has never been destructive with the furniture, nor is he possessive/territorial with anything.
Now that we have 2 kids, they too share their furniture with Kai. Kai's favorite piece so far is the Disney Princess foldout couch, as opposed to our real leather couches and the other Elmo foldout couch.
You can often find Kai nibbling on the little couches when he's feeling anxious.