Replace marriage with 5 year contract
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Replace marriage with 5 year contract.
Lifelong marriage is proven not to work out for a lot of people. So why not replace it with a 5 year contract to be prolonged by both partys on expiration date.
This way "sluggish" behavior on both sides will be "punishable" by not prolonging the contract. "It just doesn't work out!" will be no more lifelong sentencing. If it does work out you just stay together. If you have kids the terms of the contract will be renegotiated.