The year is 1957. Imagine you are sitting in a movie theater watching a movie that just came out. Halfway through the movie you get this sudden craving for popcorn. You get up and go buy some. After watching a little more of the movie you get thirsty for some Coca-Cola soda. Once again, you get up from watching the movie to buy some soda, then sit down and watch the rest of the movie. After the movie is over, and you're driving home, you ask yourself "why did I just buy that popcorn and soda? I wasn't that hungry before the movie started."
             One reason for you having an impulse to buy those products could have been because you just felt like some popcorn and soda. Another reason would be that your brain picked up a hidden message, also known as a subliminal message that was flashed during the movie at about a frame length of 1/3000th of a second, telling you to buy the products. Subliminal perception, which is the "perception of stimuli about which a person has no awareness" (Encarta 98), affects the way the human brain perceives images and translates them to mean one thing or another. The idea of using subliminal messages in advertising was brought to people's attention in 1957 when it was experimented in a movie theater in New Jersey. The experiment was conducted by Charles Vicary. But whether the concept is effective or not is still in question. There is still evidence of it being used in advertising and marketing schemes of the present day, but very few of these sightings have actually been confirmed as intentional or effective in their purposes.
             One example can be how tobacco product manufacturers attempt to manipulate people who purchase tobacco products. On the cover of Camel cigarette packs, there is a man with an erect penis embedded in the front leg of the camel. On the cover of Marlboro cigarette packs there are two KKK clansmen holding
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