So, I got some cheeseburgers and when I get back to the car I tease my slave - hold the burger right under his nose - but he won't get it - yet! He has to take off my shoes while I unpack the burger, lift the top bread and spit on it. Then I simply put the top back and throw it on the ground. I crush the burger right in the middle of the dirty parking lot and grind it under my bare feet. Then he gets to eat a few pieces before I spit on the crushed burger again and he gets to eat the remains. In the end - when the pieces are too small to stick to my foot - I even make him eat it right off the dirty ground :-D