Originally Posted by
bensyd
It tastes like eating stale vomit.
Perceptive palate. The milk in Hershey's milk chocolate is treated with butyric acid, which acts as a preservative. Butyric acid has a distinctive sour smell; it is responsible for the aroma of barnyard waste, dog anal glands, and, yes, human vomit. Here is some not-appetizing background:
https://www.chemistryworld.com/podca...017662.article