It's the same as changing the mindset about saving money rather than spending money. As long as you want to spend money, you will see saving and investment as a sacrifice which interferes with your immediate pleasure. But when you learn to enjoy having money work for you instead of your working for money, you will look forward to saving and investing, and see spending as a sacrifice that you must sometimes make.

As CWMI said, when you see that doing things together is to your benefit, and your happiness in the long run, rather than just your spouse's immediate happiness, you will look forward to the opportunities to do things with them.