Final answer:
The narrators across the texts imply varying ages and experiences with the opposite sex, ranging from maturity and experience to youth and inexperience, suggested through direct statements, demeanor, and psychological evaluations.
Step-by-step explanation:
From the various excerpts provided, it can be inferred that the narrator's age and experience with the opposite sex vary across the texts.
For instance, the phrase "twenty-eight years of womanly life and all so lonesome" suggests that the woman in question is mature in age and potentially experienced, but lonely, indicating a lack of successful romantic connections, despite her apparent material wealth and being liked by many.
On the other hand, Winterbourne's comment, "I am not so innocent," coupled with his smiling and mustache curling, hints that he is a man of some maturity who understands the social games between sexes, perhaps indicating he is more seasoned in affairs with the opposite sex.
Similarly, characters like McTeague and Venters express perplexity or disillusionment with women, suggesting varying degrees of experience and possibly a younger, less assured perspective on interactions with women. Lastly, the writer's examination of Jean, placing his mentality at the level of a ten-year-old child, implies a lack of maturity and thus a probable inexperience with romantic relationships.