Yeah personally I go off how I look. I get to a point where I suddenly start gaining a ton of fat quick and that's when I know.

And then they'll complain to their boss and maybe the boss will pay them more. That's on the boss

Marriage already has a built-in prenup. It's called state divorce law, and most people sign up without reading the terms.

Want different terms? Get an actual prenup. But bringing back fault divorce just creates a courtroom circus where everyone pays lawyers to prove cheating, cruelty, or abandonment. Great business for attorneys. Terrible for everyone else.