A gram of the artificial sweetener aspartame is much sweeter than a gram of sugar. Soft drinks that are sweetened with sugar are, of course, sweet
those sweetened with aspartame must be even sweeter. Thus people who regularly drink soft drinks sweetened with aspartame will develop a preference for extremely sweet products.
Joe's piggy bank has only pennies in it, and Maria's has only nickels. Nickels are worth much more than pennies. It ttherefore follows that there is more money in Maria's piggy bank than in Joe's.