I don't know that this is an age thing as much as a personal preference thing? I prefer very explicit up-front conversation about money at all stages of a relationship, because otherwise I find it's too easy for one party to begin to feel like the other one "owes" them something intangible for X, Y, or Z. And that's historically gone to icky places pretty fast, especially once you add gender into the mix. (I am reminded of this article from the 1960s, which takes a very old-fashioned approach to marital finance but with which I nonetheless agree on the basic point that preventing financial arrangements from becoming explicit is ultimately to the advantage of the person with more power, not the person with less.)