Dating a guy 4 years younger than me
Current research summarized in a BBC review, suggests this is So, on average, a man choosing a woman five years older is marrying his physiological equal. If an 80-year-old man is married to a 75-year-old, physiologically 70, even if she still loves him, she may feel he's an albatross and he may feel he's a burden.
In contrast, if he had married someone five years older than him, they're more likely to be health peers and to fade away together.
So, for example, anecdotally I've observed that more women than men ages 35 to 40 want to do do extreme sports such as rock climbing, run marathons, or do triathlons.
Objections Today, thanks to prenatal screening, most women have a high probability of having a healthy baby through their 30s and even early 40s.
For many people, the difference in fertility rate is too small to trump the factors cited above.
The Takeaway Most important in choosing a wife, of course is compatibility: sexually, interpersonally, in values, plus whether they're kind and, of course, that you love each other: You feel great just being in a room with that person, you put each other on a pedestal, and are pleased to do things for that person.
I expand on those in the article, Should You Marry This Person?