Me too. Consider how God designed the human body, and that marriages 100 years ago lasted much longer than they do today. The fact is that there is a causal relationship between length of schooling and the period of "adolescence," or extended childhood.
Reflecting on how it could work, financially ... say you have your young man. At 18 he gets a job, while still living at his parents' home. He can save the majority of his pay for his future expenses and/or education. His parents have also saved money for his college expenses.
Five or six years later, he's 23 or 24, meets nice girl, 20 years old, gets married. The girl has been living at home attending community college, has associate's degree in something practical :-). Now young man applies for college, knowing what he wants to study. Maybe he's got some CC transfer credits for the basics. His savings plus his parents' savings plus financial aid should be more than adequate to cover tuition, books, and a reasonable standard of living for himself, wife, and potential child. (Health insurance through the university? Health savings account? Not sure on that.)
He can be a full time student, just as many 18-23 year-olds are. Even more easily, because they've been earning interest on the savings longer. Wife can hold a job or be a student, as well, if she's not immediately having a child. If they do have children, maybe she can work from home - taxes, computer programming, sales, babysitting etc. - if they think it's worth the effort.
It seems to me that, among other benefits, the long-term financial outcome would be improved, because the couple would be motivated to be financially responsible from their earliest years of earning. Many young people spend the majority of their pay on things of no lasting value during their single years, and then start out their marriage with both debt and feckless habits.
Opinions?
Well, they might have lasted longer if it hadn't been for that whole death thing. According the National Center for Health Statistics. The life expectancy for a white male in 1900 was 48.3 years. That kind of thing makes silver anniverseries rare.