This song finds Plant singing about removing the tough exterior he'd developed as he became successful in the music business. "As adults we have to put our shoulders back, but when I was a kid I saw everything as being absolutely beautiful – there was nothing but wonderment," he explained to The Independent. "In the early part of my time in Zeppelin I wrote naively, but I loved all that mystery of the dark past and the Queen of Light. Unfortunately, I had it taken away from me bit by bit."
"Piano Man" was inspired by Billy Joel's time playing at a piano bar in Los Angeles. The "real estate novelist" was a guy who always talked about writing a book, but spent all his spare time in the bar.