Secret to life?

How come when you want something.. it seems unreachable? But, when you have it.. it seems impossible to get rid of, and you no longer desire it anymore? How come humans, myself included only want what we cant have, and when we do.. we don't want it anymore? The brunettes always wanna be blonde, the straight haired girls want curls, while the curly-haired girls are spending hundreds on hair staighteners... and so on. If we could all just learn to be happy then life would be perfect.. right? Wrong. If we were happy then we prob wouldn't feel as if we need help from anyone.. and we would become cocky, self-righteous, and down-right rude. So I guess we should all choose to be content in our discontentment. And then truly we have found the answer to life. Perhaps I am wrong, but it's worth a shot.