It's a myth, plain and simple..... So, jerk it as much as you want, you'll grow just fine still..... Just use some oil so you don't dmg the skin on your penis from so much pulling....
I just realized that this is the "niddle" guy. Sorry to keep busting your balls bro. English is obviously not your first language, which means you speak at least one more language then I do.
It's still fucking funny though.
wow, 345 posts and you actually thought this was a valid question? hope you are joking because it sounds like a college kid trying to rationalize this thing away.