I’ve been a big fan of Madonna’s music for a long time. It sounds a bit quaint to say so now, but back when she was still emerging on the music scene, I loved listening to her on that paragon of personal entertainment, the Sony Walkman. Even when the Discman replaced the original Walkman, I was reluctant to switch: the benefits of the new device simply weren’t enough to win me away from my tried and true Walkman and my collection of cassettes. In fact....