The divorce rate is a little cooked. Those who suck at marriage are represented over and over. Those who are great only get included once each.
But it is also that those who stay together, aren't necessarily doing well. Time served doesn't equate to a good relationship.
The only workaround I've found is if I just give you 100% of my oranges, and you give me 100% of your chickens; then I can be openly appreciative of their lovely plumage and delicious eggs without hurting my supply.
Or, you can give the best of your oranges and I can give my best chickens.