古怪的貌似公平的男女關係??????

It is because child bearing is not women's main job any more. Birth control and washer machine liberlized women.

North American and Northern European's women 's social status improved a lot recent year. While Chinese backwarded. 

When the wealth gap is minimal, the age difference between "lover" would be reduce. Young women would not find wealthy old men "attractive" any more. Women are attracted to younger men too but the world is men's.......