sexual maybe

romantic? really?

I had an assumption that most of human history, marriage was more of an arranged marriage thing. With a lot of "women being treated as property", "heirs required for transfer of wealth", etc notation.

And there were also societies that were polyamorous in nature?

We are in a new world now, there is no need to force traditions (or worse yet, false traditions) that frankly doesn't seem to work anymore

Forget human history, that's the resultant of the median behavior optimized by Nature to produce the continuation of the specie.

At the individual level the pinnacle of happiness is teenage years and early adulthood.

Why wouldn't a rational individual not seek to prolong the behaviors in which one engaged during the pinnacle of happiness