Watch US television for any length of time and the endless spume of adverts will eventually separate into three distinct types.

The first are adverts for units of generic food-substance, each one essentially the same hand-sized grenade of glossy and salted microminced matter; but each also with its own industrialised repertoire of colours and noise and packaging required to dress it as a distinct genre of actual human food. Try the delicious new Flame Sauced Philly Cheese Taco Wing Waffle Dog Deep Dish MegaDeath Burger Grenade-Shaped Eat Thing. You won’t be disappointed. Or you will be. Whatever.