Recently, our daughter (17 in June) told my wife and me that she has started dating not 1, but 2 guys. No introductions needed since we already know them; they’ve been close friends of hers for quite some time now. Daughter put it as: why do I have to choose if I like them both and they don’t mind sharing?
I just don’t like it.
Or they have a functional polycule. That is an option. I’m not betting on it by age alone, but it’s an option
I wouldn’t take those odds, but I’m living proof that it can work. My highschool sweethearts and I have been an item for 20 years.
Oh yeah. I married my first boyfriend, though we met when I was 24 (out of the closet at 22, took a while to try dating). That stuff can work, but I’m just not gonna bet on it