There was a time* in Archie comics where Betty, Archie and Veronica were straight up in a poly relationship, except of course it wasn't called/presented as such
But I distinctly remember a panel (might have been a full page "pin up") where Betty and Veronica are discussing on which day each of them would be free so they could schedule separate dates with Archie without accidentally overlapping
And then it hit me like. They're both In a relationship with him. It's not a love triangle anymore, they're both already dating him. At the same time. They're communicating with each other about it too.
I really wish I could find that panel again, it made a huge impression on me.