I developed a taste for spicy food after years of avoiding it like the plague for digestive reasons but only found out after I had a strong craving for Indian food and accidentally got something really spicy. I also can't bring myself to order tortas because I ate one too soon after getting really sick from tacos. Reading the word "tortas" makes me feel nauseous but "tacos" does not and I can eat both without any negative response (once the food is in front of me). These examples are orthogonal to yours but I think they're illustrative of just how complex the interactions are. I don't doubt the adaptations you mentioned are there, just how prelevant they are in a modern agricultural society.