It begins, by definition, where our supposed ancestors finally developed into Homo Erectus.
we come to the Chalcolithic or the copper stone age, with its sub-divisions varying according to the regions. The stone age chronology is clearly evolutionary, and occupying a period of approximately 2,000,000 years, telescopes down as we get closer to the present.
Many younger guys are driven to women who are 10 years older than they are or more, as these women are often more confident and more sexually driven and passionate than the younger women.
These younger guys are both curious and excited about dating a woman who, is not ashamed of what she wants sexually, unlike the younger girls of his own age who are often confused about just about everything, including their romantic and sexual desires.
However, once those numbers become even larger—20-, 30-year differences—the odds of divorce are higher.