[0]: http://en.wikipedia.org/wiki/Eunuch#Eunuchs_in_the_contempor...
However you might also hypthesise that high levels of testosterone might cause you to engage in behaviors that would make make other people want to kill you! Also including other risky behaviors such as driving fast this could also be a direct effect of testosterone.
A very interesting thought!
After my second orchiectomy related to cancer, I had to wait several weeks before I could see an endocrinologist about testosterone replacement, so in that time my bioavailable testosterone basically declined to nearly nothing. At one point I became so mellow that stuff that would normally bother me just got ignored. In some ways, it was a kind of a bliss-- I even considered not having testosterone replacement therapy.
That was short lived, however. My endocrinologist told me that I needed testosterone to continue being healthy -- to maintain bone strength, etc., so I ended up doing the TRT.
Because of this, my doctor and I both agreed not have my dosage increased. From my perspective, I just didn't want to use more meds than I need to.
What is very clear though is the association in non-eunuchs of low T levels with a host of very harmful medical conditions including heart disease and osteoporosis.
Studies have consistently shown Low T is associated with these conditions and many more, but the evidence that T fixes them is unconvincing.
From my extensive review of these studies the problem is that the studies were too small and that those running the studies were too often, like too many people doing medical research, statistically illiterate.