‘During Covid,” says Desmond Child dreamily, “the whole city of Chicago opened their windows at the same time and sang Livin’ on a Prayer.” The veteran songwriter breaks into a proud grin. “It gave them hope and community. Jon Bon Jovi always tells me, ‘We didn’t just write a song – we wrote something special.’” And their something special has now notched up a billion plays on Spotify. Child also co-wrote Bad Medicine and You Give Love a Bad Name among many others with Bon Jovi. He penned Dude (Looks Like a Lady) with Aerosmith, Poison with Alice Cooper and...