I'm a little confused on how the penis actually gains length. I know that the ligaments stretch, but when doing manual stretching and jelqing (basically doing DLD's [words=http://www.mattersofsize.com/forum/penis-enlargement-newbie-forum/1597-dlds-first-routine-i-gained-2-inches-with-this-routine-full-tutorial.html]newbie routine[/words]) do the ligaments and the corpus cavernosum stretch or just the ligaments? thanks