MEXICO CITY (AP) — Guillermo Barraza buzzes with a nervous energy as he watches himself transform. Tonight, in a small studio set in the heart of Mexico City, Barraza is making history. (AP Photo/Aurea Del Rosario)The shows would often use gay slurs and cartoon-like stereotypes. (AP Photo/Aurea Del Rosario)Behind it is a blanket of fear, a reminder of the weight of what he’s undertaking. (AP Photo/Aurea Del Rosario)He sees flashes of Baena smiling and laughing next to him behind the cameras of his studio.