“I can’t believe that Luke Perry is dead.” “Who’s Luke Perry?” “He was before your time, Andrea. Here’s a photo of him.” “He’s cute but not as cute as Shawn Mendes.” “Who’s he?” Andrea rolled her eyes. “Really, Mom? You don’t know who Shawn Mendes is?” “No.” Sigh. “Here’s my wallpaper of him.” “He’s cute …