It’s easy to laugh at a grown man in a rubber dog suit chewing on a squeaky toy. Maybe too easy, in fact, because to laugh is to dismiss it, denigrate it – ignore the fact that many of us have found comfort and joy in pretending to be animals at some point in our lives. Secret Life of the Human Pups is a sympathetic look at the world of pup play, a movement that grew out of the BDSM community and has exploded in the last 15 years as the internet made it easier to reach out to likeminded...