Ya, i think every one like to be a beautiful and attractive person in the society. And nowadays people like to change fashion every time to maintain himself as per the society standard.
Actually a time come in our life when we start felling bore and that time we need changes. It's not in only fashion i think in all other things it's same. One come and become old and new one one come then again people start loving old fashion so i think it's the nature of people.
Fashion is become a most part of our life. We can't think to wear clothes without fashion. Every one want to be fashionable. Therefor fashion trends repeat themselves. And designers has played a big roll to repeat this. In coming days everything will change into fashion.