When B.B.’s left hand jumps to grab his guitar Lucille and plays a few notes, the decades melt away. Also melting: women, who screamed with each note. Add to that list: any guitar player, male or female, in the room. All of who were well aware that the way they play their instrument was influenced by what the man on the stage was doing, decades ago. So it’s a privilege to see that man still doing it today.