There was a sci-fi show in the 90s called "Earth 2" where this was the norm: marriages normally lasted only 5 years. It actually sounds like a good idea to me.

There was a sci-fi show in the 90s called "Earth 2" where this was the norm: marriages normally lasted only 5 years. It actually sounds like a good idea to me. It was brought up because one foolhardy couple in the group of characters got married, and decided to have a lifelong marriage instead of the standard 5-year term.