What is the theme in A Sport and a Pastime by James Salter?

The narrator's fantasies are another theme in the story. Throughout the story the reader must always keep in mind what the narrator himself mentions on several occasion: The story of Dean and Anne-Marie is an uncertain mixture of reality and the narrator's own imagination. Though he initially appears somewhat normal, it is clear that the narrator has a strange and even disturbed psychology; if one does not understand how his neuroses affect both the form and content of the story, the novel will be completely misunderstood.