Every man wants high Testosterone. The problem is serum levels are usually tightly regulated to stay in a certain range by the body.
Increasing your serum levels via drugs/injections/supplements is doomed to fail in the long run becuase your body will down regulate its own production of T.
The key is actually to increase the androgen receptor's on your cells. They will suck Androgens out of the serum and by the bodies self regulatory system, it will sense low T and therefore increase its own production.
Afterall, theres no point having the T levels of a horny bull if your cells aint expressing any androgen receptors.
Anyway, it was interesting to see this study suggests a link between androgen receptor expression and P70S6k.
More investigation to follow.