What is the main purpose of this conversation?

M: Did you see that TV special on Norman Rockwell last night?
W: Yes, I did. It was really good, wasn’t it?
M: It sure was. I thought it was really interesting how he developed the paintings in states starting with photo- graphs.
W: Yes, I did, too. It never occurred to me that he would have actually employed models.
M: I know. But it does make sense to use photographs of real people, to solve as many of the composition problems as possible before starting to paint.
W: True. Anyway, you know what I like most about his work?
M: What?
W: Well, when you look at one of the magazine covers, which magazine was it?
M: The Saturday Evening Post.
W: Yes, you can just tell what the people are thinking and feeling. The picture really tells a story.
M: You’re right. I like that, too. And to think that he created several hundred of those.
W: Amazing. Of course, that was over a period of almost sixty years, but still...
M: I’d like to see them when that exhibit comes to Miami.
W: What exhibit?
M: The one they mentioned after the special.
W: Oh. I must have turned it off before the announcement. I’d like to see it, too. Let’s go.