I don’t know when it happened, but at some point we—as a society—decided that it was indecent to consume a carbohydrate on or in another carbohydrate. There are some exceptions, such as Taco Bell’s now retired spicy potato soft taco and the UK’s chip butty, but in most circles, carb-on-carb is a fairly rare…
source https://skillet.lifehacker.com/should-you-eat-ramen-on-toast-1845962579