I have no idea how to twist a penis permanently, sorry, If it bothers you, see a doctor? I don't think it would really matter to your lover?
you should give a heads up to pics. anways i wouldnt be to worried. unless you are looking like a bannana heading east i wouldnt worry. like stalk said^ does it matter to your lover? unless it's seriously a problem i wouldnt worry about it. everyones dick is different, except that they are all ugly, haha.
Do you have a too short frenulum? That is the stringy thing in the "inverted v" on the underside of your glans (head). If so, when your penis is erect, the frenulum may pull the glans to the side. This can be fixed by a minor operation called a frenuloplasty. PM me for more information.