Rules of couch-sitting

Dieter channeling Sheldon. We're all in our places with
bright shiny faces. 

In "The Big Bang Theory," TV show, Sheldon Cooper has "eternal dibs" on his assigned spot on the couch. And nobody else had better try to sit there!

Similarly, at our house, we all have our assigned spots on the couch when watching TV. I sit on the left side, Lloyd sits on the right side, and Dieter gets the middle. 

In Season 2 of "The Big Bang Theory," Sheldon explains the importance of his spot on the couch: It is “a single point of consistency in an ever-changing world,” and adds that if his life was “expressed as a function on a four-dimensional Cartesian coordinate system, that spot at the moment he first sat on it would be 0,0,0,0.”

So I'm pretty sure Dieter knows nothing about Cartesian coordinate systems, but he is smart. And definitely particular about the couch. If one of us sits in Dieter’s spot he gets all Sheldon on us. Eighty-four pounds of dog insisting you're "in my spot" means we usually acquiesce to Dieter's whims.