Back in the 90s there was a TV show called Earth 2. It was kind of cheesy (about future colonists who were trying to make a go of establishing a human colony on another Earth-like planet) but still entertaining. It did, after all, star the sexy Antonio Sabàto, Jr!
One thing that resonated for me in that show was when two characters’ marriage was “up for renewal,” and the wife wasn’t sure she wanted to renew. In this future society, marriage was indeed a contract, but with an expiration date that you can negotiate for renewal—similar to satellite radio subscription. This “contract” concept of marriage always stuck with me.