Hedonic processing of pleasure and displeasure motivates behavior, influences decision-making, and is essential for survival of both the individual and the species. While much of our behavior is geared toward seeking pleasant experiences over both the short and long run, we will also work to avoid aversive or painful experiences. The hedonic valuation of sensation helps to guide us toward which behaviors to engage in and which behaviors to avoid. The hedonic value of sensory experiences is linked to homeostatic processes. While the taste of chocolate can evoke intense feelings of pleasure, the very same stimulus can change its value and become less pleasurable after having eaten too much.