I got my first Clue in junior-high Civics class. We had a very engaging teacher, who eventually ran for public office (but I respect him anyway). I have no idea what brought the discussion to advertising. He told us that Coke and Pepsi were actually addicting and the advertisers hoped to get you addicted so we would buy more. We couldn't believe that They would do such a thing as sell us an addicting substance! Teacher challenged us to drink our caffeinated beverage-of-choice daily at the same time for a week and then stop. About half of us tried it. ("Mom, REALLY, I have to drink pop for school! Honest!) Three-fourths of those reported feeling headachEy and cranky when we stopped. That was my first lesson that there are people out there trying to manipulate me; I need to PAY ATTENTION!