Everything human do is tinged with emotions. Emotion changes the way we think and guide us to towards the good. Affect and emotions are crucial in everyday decision making according to neuroscientist Antonio Damasio who studied people with impaired emotion systems. These people are unable to function effectively in the world because they were unable to make decisions. They could describe how they should have functioned in a logical and rational way but still couldn’t determine where to live, what to eat or what products to buy. The people in Damasio’s study were often unable to choose between alternatives, especially those that appears equally valid. This is where the people with intact emotions would choose something because ‘they just feel like it’. Such feelings are expressions of emotion and are crucial to human behavioral.