What is “When Harry Met Sally” really about? What is the movie’s one central theme?

After viewing the film, “When Harry Met Sally,” answer the following question in essay form. Be sure to justify your answers with specific examples from the movie. I will post a link below for you to watch this movie (if you have any issues with it inform me and I will provide you with an alternate link).

Question: What is “When Harry Met Sally” really about? What is the movie’s one central theme? How does this tie-in with the older couples’ interviews scattered throughout the movie? What are the filmmakers trying to say about the nature of love and life?