Because they're engineered to optimize the bliss point (that "just right amount of saltiness, sweetness, or richness")? https://en.wikipedia.org/wiki/Bliss_poi

Because they're engineered to optimize the bliss point (that "just right amount of saltiness, sweetness, or richness")? https://en.wikipedia.org/wiki/Bliss_point_(food) https://en.wikipedia.org/wiki/Bliss_point_(food)