Well, an "americanized long-term relationship" between forme sauna worker/client where both partners work, have similar income and share almost the same responsibility in paying the household bills or caring for the kids is yet to be seen by me... let alone experience it.
But I did know some boys that were "married" for 2-3 years, like the old days straight marriage were the wife was never intended to work or put any money on the house.. just care for the kids... but they never lasted until kids are born.