Approximately one-third to one-half of the penis is inside the body, and is internally attached to the under surface of the pubic bone. Penis lengthening involves the release of the fundiform ligament and the suspensory ligament that attaches the two erectile bodies to the pubic bone (ligamentolysis). The suspensory ligament makes the penis arch under the pubic bone. Release of this ligament allows the penis to protrude on a straighter path, further outward to give more functional length. With the penis on stretch, the ligament is divided close to the pubic bone until all midline attachments have been freed. Once these ligaments have been cut, part of the penile shaft (usually held within the body) drops forward and extends out, enlarging the penis by 20-30 mm (0.78-1.18 in.) if you decide to undergo penis enlargement try to get some idea in penis enlargement forum and to gain knowledge about x4 labs reviews.