My husband and I have always had a deal where we live off the higher salary, and the lower is allocated as our "fun money" (dinners out, travel, etc.). We've swapped back and forth over 20 years, but it worked well for me psychologically when I was making less, since everything we did that wasn't grown up stuff came from "my" side of the budget,
That's pretty similar to what my wife and I do. It helps that my income is enough to fund the mortgage + expenses, but if she wasn't working we wouldn't have as nearly as much "fun money"