Somewhere in North Jersey, in the cavernous bathroom of a more-money-than-taste mansion, Jon Bon Jovi blow-dries his hair and stares at himself in a mirror, his tresses and layers and waves billowing about him like a boat’s sail caught in the breeze. He is lost in thought: God, I’m sexy. People say having a rest stop named after you on the Garden State Parkway is a tremendous honor. But what’s to be proud of? It’s just a place where people go to the bathroom or buy Cheetos. What’s that even mean to have a loaded six-string on your back? Where…