A close-up image shows a bowl of blue M&M candies. | Peter Macdiarmid/Getty Images If you were anything like me as a kid, trick-or-treating meant one, maybe two, pillowcases full of candy every Halloween.  And as fun as collecting all that candy could be, the real fun began when I got home and dumped my winnings onto my bedroom floor. That’s when the sorting began. I had some very specific rules: The usual suspects — think Smarties, Tootsie Rolls, and Dum Dums — went into one pile. Fun-size chocolates, like Snickers, Reese’s Peanut Butter Cups, and Baby Ruths, went into another....