Part of what make this scene funny is the completeness of Cecily’s delusion: She maintains her…

Part of what make this scene funny is the completeness of Cecily’s delusion: She maintains her deluded sense of romance even as she explains it to Algernon. How does Algernon react? Does he talk her out of her delusion? Wilde has obviously created absurdly unrealistic characters. How does this rejection of realism make this a more enjoyable play?