OK. OK. The "Spinal Tap Theory" ("The DIBERGI Solution") "is" plausible. There is, in fact, a good chance that it may indeed hold a key to "Elevenses"... i.e.:"Eleven". You can't beat a sleeping horse. Let it lie.
But that still makes no attempt to justify the "Why?"... to wit:
Why DO you humans keep your candy bars ON TOP OF THE REFRIGERATOR?. It's warm up there! (the compressor below and all), and usually quite dusty. (Did you know that household dust is made up, primarily, of shed human skin?)
During warm weather, IT CAN ACTUALLY APPROACH "HOT" in this location... not at all the best choice to preserve chocolate compounds that are primarily bound together with WAX. And also, during this same season, household sanitation often becomes lax. Due to preoccupation with "outdoor" trivialities, this same storage? area is, typically, VERY DUSTY. Very dusty. LOTS of dust.
Perhaps even too dusty for consumables? Perhaps. Perhaps "the REST of the story"? Perhaps.
jg