If I were to guess the binge is the event which triggered the dislike but would suspect another negative event at the same time. Given chocolate can also cause some people headaches or just head discomfort - that might have been enough to make the association.

I hear the same sort of thing happens to people when they get seriously sick vomiting furiously - the last thing they ate they find off putting for a time.

Apparently before I was 6 or 7 I loved fried eggs, after a bad hiding ... 45 years went by before able to tolerate them with a lot of hot or bbq sauce.