The brain is a powerful tool. It can pick up anything you see without realizing it. Then for example lyrics like i like to party, im a gangster go straight to the subconscious without realizing it.
That's why there are so many songs containing sex, drugs, backward messages because they know how the brain would react. And when you like the song you sing it over and over. And when you sleep everything you saw and heard the other day
plays in your subconscious and starts to become your reality.
That is how they are breaking your morals and behaviour without even realizing.