There’s a famous Bob Gruen photo of the members of Led Zeppelin standing beside their tour plane. In the picture, Robert Plant’s arms are spread and his chest is bare as if he is welcoming girls of all ages, sizes and passions to his private, flying playground. John Paul Jones is on the left, shirt open as well, hoping some groupie will mistake him for Plant and give him some play as well, and between Jones and Plant are John Bonham and Jimmy Page, both seeming ...