Why do females tend to live longer than males?
Why do females tend to live longer than males?
user
It’s pretty well known that females live longer than males in pretty much every mammalian species, which is why most insurance companies have a gender-based rating system for health insurance.  A typical difference in life expectancy is 5 years, though it varies.
assistant
But why do females live longer?
user
Males have more chances to die earlier, due to a greater risk of serious disease, and more causes of death related to trauma.  Also, if a female survives pregnancy, they have a better chance of living long, due to a better diet.
assistant
Bt why do males have a greater risk of developing a serious disease?
user