It's always amusing to watch someone of an older generation analyze yours quasi-anthropologically. I never went to one of the elite schools of which Brooks writes, but I have friends who did; and there are more general insights that have the ring of truth.
Also, there's the humor of seeing an older naïf navigate this territory that the kids all take for granted. When he talks about hookups like they're a ritual dreamed up by Martians, you want to say, "Duh! How else could it work?" But, of course, all social conventions seem alien if you didn't grow up with them.