Nice try, but you cannot use this myth to justify your chocolate or ice cream or potato chip attack! The human body just does not work this way. A craving is a psychological phenomenon, although it’s also been suggested that certain foods, such as chocolate, may trigger the release of “satisfaction” signals in the brain. Either way, however, it has nothing to do with nutrition.
look at cultures (often asian islands) that let eggs develop partially to obtain more calcium… or iron deficent people who have a taste for blood…
that being said, chocolate is not really much more than fat, sugar and a few neuro chemicals that do cause something of a learned craving.
People develop a tolerance and then a taste for, say, chili peppers, because they do provide something your body wants. Very different from wanting heaps of deep-fried oreos.