Since the previous post discussed the ill effects that steroids have on personality, I want to pass along something my son told me a while back.
He had read about some writer who was HIV-positive, and took testosterone as part of his treatment. The writer noted that whenever he got an injection of testosterone, he would notice an almost immediate boost to his wit and cleverness.
I asked Johnny where he had read this, and he couldn't remember. So I am passing this along to you secondhand, and unable to ascertain it. But my son wouldn't have lied to me about this, and it does ring true.
It also backs up a statement I made here.
Addendum, two hours later: Steve Sailer just pointed out that the writer my son was referring to was Andrew Sullivan, and gave the following two links:
My son does read Sailer's blog -- isteve.blogspot.com -- religiously, as do I, so I'm sure that the first link is where my son saw it.