According to an almost-friend of mine, there is a happiness-system. It's really easy to understand if you think like him.
like this for an example; being sick is -5, but getting a new dress is +7, you will still end up on the happyside, tus, you will have a good day.
And today, it's been a really-really good day. My head hurts, throat feel icky, can barely think BUT i finally bought it - a pink princess dress! I really can't wait for it to arrive, i'm so-so-happy!
dollythe ze doll.