And there is a good reason for more one-to-many pairings: more choices. Back in the day less desirable partners had more chances because of proximity. Today it'

And there is a good reason for more one-to-many pairings: more choices. Back in the day less desirable partners had more chances because of proximity. Today it's easier to search for partners (for the same reason it's easier to shop), so more desirable people have more choices.