The narrator is very anxious throughout his interaction with the girl that she might notice that he is blind. He pretends very hard to say things that he think a sighted person might say, and to ask the kinds of questions he thinks that sighted people ask. He also starts to feel very attracted to the girl's voice and the smell of her perfume, and his lies are motivated in part by his attraction because he wants to appear normal for this girl whose voice he likes. There is a fair amount of tension created by her (and with her the fantasy constructed by the narrator). The final reveal of the girl's blindness, however, comes out of thin air after the tension has started to dissolve with the arrival of the new passenger.