We can say that, but unfortunately we don't live in a vacuum.
Relationships are unfair from the get go. Men peak sexually quite early; women much later. However women are restricted by their biological clock -- tick, tick, ticking away. Men can father children well into their golden years -- so they can afford to horse around and not settle down for awhile.

"Marriage is a wonderful institution...but who wants to live in an institution?" -- Groucho Marx