I participated in a food discussion board for about 5 years. Because people posted on the board from all over the U.S. (and also Canada and Australia) their regional tastes affected their food preferences. As a lark, I created what I called the New Jersey Condiment rules, which all loyal native New Jerseyans were expected to observe:
• mustard goes on pink meat (such as ham, bologna, and hot dogs)
• mayonnaise goes on white meats such as chicken and turkey, tuna, and potato and noodle salad.
• ketchup goes on hamburgers, French fries, and (possibly) meatloaf and cube steak sandwiches.
I told the other board members that if you broke the New Jersey condiment rules (such as by putting mayo on pink meat) they charged you double tolls on the Garden State Parkway!