This one is actually a good question. Well first, this is from the great gatsby. Fitzgerald was trying to give a balance view in the beginning of who the great gatsby was. And even the author, he lived a wonderful life that is why he related that into Caraway's character, having the same background as him.
Answer: Lexington would talk about how important is work for teenagers, since the story of the hardworking Reagan is presented as an example.
Explanation: Lexington presents Reagan's story as a way of differing with many americans that claim summer jobs to be boring. Reagan was a harworker young man, who worked as a lifeguard, but in comparison to some teenagers, he would take it seriously to the point of saving people's lives from a river and scold them for it. He would wake up early and do his job for 12 hours a day, seven days a week. Therefore, If Lexington is presenting Reagan's hard routine, he would answer to a question like that by making the difference between lazy teenagers that complain about muscle ache and how they should value it, like Reagan.
The Climax comes after it
Well in the book he thinks about how easy it was when he was with the boys and how easy it was compared to how he does nothing but work now
