Sally Kohn: I found if i wear exuberant clothing, i will have three times as many conversations with strangers. By wearing that jacket or a hat, you're giving people entry point to playfulness and for conversation. In my book, i talk about the concept of playgrounds, which is basely creating some sort of structure that invites people to interact with each other in a playful, light hearted way. She says it's like having props for play, or for fun, as she thinks of it.