Jon Bon Jovi: ‘The only thing that’s ever been up my nose is my finger’

After life-altering vocal surgery, the 62-year-old New Jersey rocker doesn’t know if he’ll ever tour again. He talks to Kevin E G Perry about the drug experience that scared him straight, singing ‘Livin’ On a Prayer’ with Prince William and Taylor Swift, and his son’s forthcoming marriage to ‘Stranger Things’ star Millie Bobby Brown