From "Men in Midlife Crisis" by Jim Conway: If he fails to resolve his midlife crisis, then his third settling-down stage following his midlife crisis, which should have been marked by a great deal of peace, will instead be marked by unsettledness and continual anguish. He is similar to the person who never quite makes it through the adolescent transition into young adulthood. That person forever tries to be a teenager. The man who doesn't make it successfully through his midlife crisis will forever try to be a young adult.
This part that Conway talks about as a settling down process is very interesting.
Must admit I never noticed it before when I read the book.
Of course now I know so much more, maybe I should read the book again.