Why do we prefer some foods over others?

When your stomach grumbles at lunchtime, and it's your turn at the deli counter, what will it be? Wheat bread or rye bread? Turkey or pastrami? Mayonnaise or mustard? Hold the pickle!

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<p><a href="http://www.physorg.com/news88964387.html">Why do we prefer some foods over others?</a></p> <p>When your stomach grumbles at lunchtime, and it's your turn at the deli counter, what will it be? Wheat bread or rye bread? Turkey or pastrami? Mayonnaise or mustard? Hold the pickle!</p>