Joy fits the facts when there is a potential gain or benefit for the individual. It urges the individual to repeat that action, do more of the thing that sparked joy. This chapter discusses the signature features of joy and presents an example scenario of joy in which the client in her early 20s has been working on reducing her self-harm, along with her cannabis and cocaine use. It highlights special considerations in regulating joy. Inappropriate joy is often seen in a chain towards addictive behaviours, where it probably appears early on, as a vulnerability factor. The manic phase of a bi-polar episode is technically inappropriate joy, and will respond to opposite action in the same way. However, during a manic phase cognitive processes can be more disrupted, as hormones and blood chemistry are affected. Up-regulating refers to increasing the emotion where someone might naturally feel it but it is absent.