Me too, I agree about the longevity and I only buy organic groceries because the little people do live longer with them and I can now afford to buy them. I consider fruit to be a grocery item, it's certainly a constant on our grocery list, as well as bringing candy home from the grocery store. So yes, I think they are begging for these treats when they ask for some "different kind of groceries". And I think they'll keep asking for them even if the refrigerator is stocked with over 10,000 units of food. They are simply asking for our praise, which they thrive on as much as sitting down to a meal.
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WARNING: I cannot be held responsible for the above as apparently my cat has learned how to type.