Stevie Nicks – Secret Guests in Rock Songs
According to Songfacts, Nicks also served as the lyrical inspiration for the song: "On the night when Stevie did the background vocals for my song 'Tunnel o' Love,' my nascent amorous feelings toward her came into a sharper focus. By the time I pulled into my driveway (while driving home from the studio) I had formulated the lyrics and come up with the magnet metaphor. From there the song was finished in 15 minutes."
Hear 'Magnet and Steel' by Walter Egan