And now we may never know why Mario Vargas Llosa punched him in the face.
Mario strayed. He fell in love with a beautiful Swedish air stewardess whom he met while travelling. He left his wife and moved to Stockholm.
Distraught, his wife Patricia went to see her husband's best friend, Gabriel. After discussing the matter with his wife, Mercedes, he advised Patricia to divorce Mario. And then he consoled her. No one else quite knows what form this consolation took... Eventually Mario returned to his wife, who told him of Gabriel's advice to her, and of his consolation.
http://www.newyorker.com/online/blogs/books/2010/10/the-nobe...