MegaDik will work on both circumcised and non circumcised penis. First month you will notice an increase in penis size of up to 1/2 inch, you will also notice an increase in sexual desire, stronger erections and more enjoyable sex.
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The penis is made up of 3 chambers, 2 large ones on top, which is your erectile tissue (Corpora Cavernosa), and 1 smaller chamber on the bottom from which you urinate and ejaculate (Corpus Spongisum).