Our modern world surrounds us with easily accessible instant pleasure. You can get your pleasure quick-fix from any supermarket, fast-food outlet, or, most conveniently of all, your mobile or PC.
Have you ever wondered why we humans do all the crazy stuff we do? Sure, there are millions of different motivations behind our actions, but if you keep digging, they all boil down to one thing: We want to feel good/better.
How happy are you, really?
This question is much harder to answer than it appears. The experience of happiness is highly subjective, meaning that our moods and biases will distort any number we try to put on it.