Idunno, I tell ya.

It's fetch: I throw it -- you bring it back, I throw it again, -- rinse and repeat.

But the game doesn't work if you bring it back, give me a look and run away with it, jump on the footstool, then to the sofa/couch/Chesterfield, pick it up, drop it and run back to me. without the toy!

Also, sitting beside my crying and barking is not a recognised solution, unless your first name is Don.

Look what you've driven me to!
https://www.youtube.com/watch?v=8-qIM1N2ONY

#DogFather