I don't think people had the luxury of that formula in preceding generations. With so much death around (especially amongst women in childbirth), "marriages of convenience" were quite common. People often appeared to marry again with undue haste, but for men the priority was to find a mother for their children, so they could carry on the duties of bread-winner, and widowed women needed a home and a regular household income. This seems to be quite cold, but that's often the way it was.
However, you also come across some people who do not fit the above category. In my tree, my dad's Aunt Eliza married at the age of 38 to a man of 20. However, the poor woman was widowed within 4 years when her husband developed a TB infection.