Some cultures actually have late middle-age as the average for childbirth. Due to diet it does not lead to any medical conditons as conceived in the West.
The cultures known for longevity also have frequent sex into their later years happiness...due to diet.
Every male in my family (on both sides) was bald in their mid-twenties. I am now double that age still with a full set of hair AND my hair started coming back in my late-twnties after I changed my diet at 25.