Oh yeah, I get what you mean...
Both men and women tend to lose hair thickness and amount as they
age. Inherited or "pattern baldness" affects many more men than
women. About 25% of men begin to bald by the time they are 30 years
old, and about two-thirds are either bald or have a balding pattern
by age 60.
Typical male pattern baldness involves a receding hairline and
thinning around the crown with eventual bald spots. Ultimately, you
may have only a horseshoe ring of hair around the sides. In
addition to genes, male-pattern baldness seems to require the
presence of the male hormone testosterone. Men who do not produce
testosterone (because of genetic abnormalities or castration) do
not develop this pattern of baldness.
I think age alone is a factor of its sensitivity to the androgens
as the person grows... it is particularly non sensitive to gonadal
hormones (testes) released in puberty but sensitive to another
different type of gonadal hormones (adrenal glands) released after
puberty...
