Can we help you so that your sandwiches have some ingredients other than the condiments? Perhaps we can all chip in to buy you some bread, ham and cheese?
Well... if you mix a cup of mayo with four tablespoons of ketchup, a teaspoon of sugar, teaspoon of black pepper, pinch of salt, tablespoon of vinegar and a teaspoon of finely chopped onions, you get 1000 island sauce also known as chip dip. and that's yum.
it's normal to have a craving for all types of foods and condiments etc. I think this is a bit gross to do but whatever works for you .... just moderate it please lol