It is a negative thing, but it used to be a way of life. No idea if there is a correlation to decreasing levels of testosterone and sperm count in males in the

It is a negative thing, but it used to be a way of life. No idea if there is a correlation to decreasing levels of testosterone and sperm count in males in the past half of a century since we have reliable data. Possibly taming men to extinction, possibly completely unrelated. Looking at my young male cats, playing and fighting is a big part of their lives. I think this is true for most higher species.