Follow the link to read the story A&P. Read the eleventh paragraph; find it (CTRL + F) searching for the term: “poor kids”.
As the story advances, the narrator communicates a relationship with the girls that is distinct from the relationship he has portrayed earlier on. He communicates this in the thought, “Poor kids, I began to feel sorry for them, they couldn't help it.”
Particularly in light of his use of the word “kid,” the narrator is likely to see his relationship with the girl as most similar to