Growing together, When you meet your wife young you have the ability to grow with each other and revolve around each others schedules giving you two the same "movie Tuesday" or "gun range Thursday" type of schedules instead of meeting down the line and having these being conflicting actions instead of uniting ones.
Investments, a relationship is like an investment, the more time you put into a good one the more exponential growth and return you will get. If you put in the effort when your young you have a lot more time to ask for improvements with your partner than if you were older when meeting.
Sex is better, when you start the relationship younger you both do not know what you really enjoy sexually yet, this gives you both the opportunity to experiment together finding out what works best for the both of you and having the joy of knowing that you are only exploring with each other.
