Long marrages rule. I think the reason for the short ones, is that the amount of effort put into it is lacking.
My folks were married for over 45 years before my mom passed away.
I remember a few big ol fights. but they always worked it out. sometimes that night, others longer. My uncle just passed due to cancer. over 50 years in that marrage. the same thing. neither my dad, mom, aunt, uncle, went looking for the quick fix by calling it quits or looking for another mate.
True, animal procration is a primal urge. but thats too easy. monogomy, to me, means that you are willing to work shit out. unfortunately this concept is missed on one part and many marrages/pairing end. Then again other pairings start because someone wants to get on another's pant's then they don't know what the hell to do, so they end up hurting or getting hurt for that encounter.
I learned along time ago, couples are going to argue and have thier difficulties. The main thing is to talk and work it out. Find the common ground.
It's when one party locks up and refuses to listen to the other, thats when the relationship fails.
Just my opinion.