I may be completely wrong here, but I've noticed that some people, rather than face up to something they find uncomfortable, they try to hide it behind suppose ignorance.
That circumstantiality with the diagram is typical. If she's been shown a cake, she would be put off cake. If she's been shown a chocolate bar, she'd have been put off chocolate.
The point is, the issue isn't gingerbread, cake chocolate, it's simply using something to represent something else.
As I said, might be wrong, but from the sound of it, I don't think I am