Fashion?

For which purpose is fashion there? Only a very little part don't follow the fashion trends that every year appears in our markets.
Sometimes people follow It in a quite forced form and because of that they also has to suffer their high price of the clothes (me). Because they are one more that interactuates between of the supply and demand, and well clothes are expensive.
Furthermore, I think that fashion is an invent that is just there to use our very influenciable minds and in consequence of that, force us to buy.
But not every one is like this, I also buy clothes, but not every year. Because, It isn't a disaster when you wear the green or the brown or the white from last year and that isn't "in"...