We all know that we don't need something, but we buy them. Why? Because advertisers induce us to buy them. They are creating demands for us.
You don't need a music phone, but advertisers tell you this music phone has many many funny functions that you want, so you buy it.
You don't need a car, but advertisers tell you this car is just designed for you, so you buy it.
We are living in the hole of consuming.