Well evolution did not need us to live as long as we wish to live. So we have artificially made products to prolong what nature gave us.They keep advertising testosterone supplements for old dudes on TV.Do we really need a bunch of Old dudes running around, with testosterone coming out their ears? When has an abundance of testosterone EVER helped a man think more clearly? Now men can be just as dumb at eighty as they were at fifteen.
Testosterone is not just for sex. It helps maintain muscle that is needed for optimal health.
I have never used it, but I can see in advanced age someone may need it for a healthy life.
Not sure if the products on TV really boost testosterone though.