Many people talk about Gatsby's parties, and how he used them to lure Daisy - but there is more to partying than meets the eye. What attracts us to each other? Can we account for this with attachment theory, or neuromodulators? Is it just dopamine, serotonin, testosterone, or estrogen? We know isolation is problematic, but we've also made relationships complicated - when is relying on another person a good thing, and when does it become a warning sign? Speaking of dependence, what impact/s do substances like alcohol and drugs have on our interactions? All this and a driving lesson in this week's episode.