from eatocracy: Is there a food you just don’t like, and you can’t explain why? Or perhaps a food that made you sick once, and now you can’t come near it? It could be the result of a million-year-old survival mechanism... What you’re experiencing is your brain protecting you from being poisoned. When we were primitive creatures, we weren’t sure what was safe to eat so we tested things out. If you survived the experience, your brain had to make sure that you never ever ate that same thing again. So, if you ate something that made you feel ill, your brain decided "better safe than sorry," and conditioned you to feel sick anytime you saw, smelled or even thought about that same food.