The answer is yes and no.
Let's start with some obvious observation. Unlike a man's scull or brain, his penis is an organ with no fixed size. Sometimes it's bigger, and sometimes it's smaller.
The size of the penis at any given time depends on a multitude of factors: genetics, body chemistry, erotic thoughts, diet, you name it.
You can use Tongkat Ali extract. Tongkat Ali alkaloids stimulate the Leydig cells of the testes to produce more testosterone. This spurts penis and testicular growth, which at least is semi-permanent. Size gains will persist for some time after the regular ingestion of Tongkat Ali has been stopped.
Leydig cell activity is essential for penis size. Which is why bodybuilders who use anabolic steroids are fools. By supplying exogenous androgens, they totally shut down Leydig cell activity, thus causing substantial testicular and penile shrinkage. Their upper bodies may look like those of heroes, but below the belt, they appear as prepubescent boys. In bed, they are a joke.
For any man who is concerned with manhood, the increased testosterone desired for muscle gain has to come from his own Leydig cells (through stimulation by Tongkat Ali or synthetic agents that exert a similar effect). Additional benefits are increased pleasure and functionality in bed.
The only approach that works for permanent gains of baseline as well as erect penis size is a penile exercise program.
A good number of such programs are sold on the Internet. Access costs between 30 and 100 US dollars. The better programs include videos on all exercises. I consider videos essential, as the various exercises are difficult to comprehend from written descriptions.
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