'Plain' should be my middle name.
On a sand
wich/hamburger:
I do not like mayonnaise
I do not like mustard
I do not like ketchup
I do not like tomatoes
I do not like onions
I do not like lettuce (leaf lettuce might be ok, provided it's not very vein-y)
I do not like CHEESE
It makes me so mad when I say 'hamburger, plain' only to be asked, 'Would you like cheese?' Do you not know what plain is?!?!?!? Of course, I often say 'add bacon!', so the confusion only deepens. It's so much easier to bring my lunch.
I do, however, like BBQ sauce.