sorry you make me laugh. In class we cheked a theory called "opponent process theory ( of course) ", it says that some stuff in our lives makes us feel happy, euphoric, sad, feeling down etc but it isn't a homeostatic state and our body is always wanting to maintain a balance, the balance in that case is feeling "neutral" not so happy or so bad because actually that feelings are not a balance, they are extreme feelings, *maybe that's the reason because you think that your happiness depends for a while on your weekly show or your fridge full of fresh food, happiness and sadness are not forever