Power Of Hormonal Action

The original intention of testosterone were the treatment of males who have too little or no natural endogenous testosterone production with hypogonadism. Appropriate use for this purpose is legitimate hormone replacement therapy which maintains serum testosterone levels in the normal range.
Many other applications of testosterone includes the following:

Infertility
Lack of libido
Erectile dysfunction
Osteoporosis
Penile enlargement
Height growth
Bone marrow stimulation
Reversal [...]

Estrogen seems to be as good for women as testosterone is bad for men. It makes women feel great and it doesn’t cost them anything.
Adult females make it themselves out of cholesterol converted by their gonads and their adrenal cortex first into progesterone, then into testosterone and then into estrogen. The ovaries carry on producing [...]