On today’s episode of Modern Notion Daily, our guest is Mark Haskell Smith, author of Naked at Lunch: A Reluctant Nudist’s Adventures in the Clothing-Optional World (Grove Press, June 2015). Haskell Smith decided to take on the role of gonzo journalist and find what nudism was all about, from the inside. His research took him to a nudist resort in Palm Springs, a clothing-optional city in France (and its attendant nude supermarkets and banks), and a nudist cruise. And he answers the question we’ve all been wondering: do people check each other out at nudist retreats? Later in the hour, contributing editor Emma Bryce talks about arugula grown in . . . space?

Music this hour: