There is no decisive evidence that satisfied marriages are because the couple "gains weight". This is absurd. You lose weight from divorce due to stress. You have a divorce because you jumped the gun and exchanged vows haphazardly and you have no spine to stick through it or you simply don't value marriage enough to keep going with it. That's a cultural issue, not a weight issue.
I don't like this article because it totally negates the important aspects of divorces and why they happen. Simply put, both partners (that get a divorce) are selfish and therefore unsatisfied. When you are unsatisfied, you worry about things like how you look, how you feel, and how much attention you are getting from the world. You basically find you worth in everything BUT your spouse. You focus on yourself rather than your spouse.
Again, silly connections. And loose connections at best.