As Valentine's Day is right around the corner, this week's Please Explain segment is all about a common, but perhaps unfortunate feeling that can creep in around this time: shame. Jennifer Jacquet discusses her new book Is Shame Necessary?: New Uses for an Old Tool, which flips the stigma of shame on its head. Jacquet argues that shame can be used as a social good. It can challenge corporations and even governments to change policies and behaviors that are detrimental to the environment. Is Shame Necessary? will be released on Feb 17.