>>13203688at puberty, the penis grows in response to testostereone. if steroid use does not increase the penis size, i would imagine it is due to penis size reaching a maximum size at a given level of testosterone, and additional amounts do not increase growth-- a ceiling effect.
like how even if you give someone massive amounts of growth hormone, they won't be 30 feet tall. there's an upper limit on what that person could ever ever possibly be.
