The opposite is also weird when one person in the relationship came from nothing, and now you share comfortable finances: Conversations like "yes plane tickets will cost $500 more than bus tickets but we'll also have two more days of vacation", or "we don't have to shop around for the very best deal".
Yep, we've been there too. It's taken me a while to come around to spending more on things now that we have comfortable finances. That said, I'm pretty proud that we rigorously optimize our spending for the things that make us the happiest, and we save a lot for early retirement.