I was sifting through some a somewhat old basket of candy trying to find something good. All the candy was wrapped in their wax paper/aluminum looking packaging. I selected a chocolate piece and ate it. It tasted somewhat fruit-like as did many other pieces. From Milky Way to Tootsie Rolls they all tasted fruity, like the other candy I had not eaten.
How does the scent of wrapped candy permeate its water/air tight packaging and another's packaging to change the flavor of all the slightly weaker flavored candy?!?
The exact science of this has always baffled me.