The other week I took a long walk with a new friend. From our southwest London neighborhood, we walked through the commons to Richmond Park where – oh the blessed history of it all – King Henry the 8th used to hunt deer. Six miles on foot, lunch by the Thames, and a bus ride home on a double decker. Pure loveliness. Walking with someone carries certain, yet unspoken, expectations: you’ll travel in the same direction, often side by side. You’ll talk. You won’t pop in your ear buds or take a prolonged phone call. The walk is the means by which you spend time together. Specific destinations and step…