We like foods that have an identifiable strong flavor, but we tire of them very quickly. So, for instance, meat eaters will give out on a plate of highly seasoned turkey tetrazzini much faster than they will on a serving of plain hamburger of the same size, even though the first bites of the turkey will be more exciting. Even more problematic for food manufacturers, those same meat eaters are likely to remember this the next time they go shopping and buy the plain hamburger more often. Food scientists speculate that this behavior stems from our instinctual need for varied nutrients, which are more easily attained by eating a variety of foods. Get too much of one thing, and the brain starts sending out signals of satiety, or fullness, to compel us to move on to different foods
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