Jesse Hepworth Posted 28 days ago Why does a fast food sandwich taste exactly the same 365 days a year? It seems that desiring(or at least expecting) consistency would be a very natural instinct. There is consistency in the taste of pretty much every food found in the "wild". If you compare oranges to oranges or apples to apples there is an expectation of consistency. When there is an inconsistency that is a sign that something is not right(it is not ripe, it has spoiled, etc.). You may have an adverse reaction or even die. At best you would likely not get the full benefits you would get if you just ate a different piece. A "demand" for consistency-not just fast food but all food selected for consumption- may very well be ingrained in our DNA.