freddre,
It’s all ready been said, but having a bend that goes up isn’t as bad as you may think. It’s probably the best thing I have going for me, where my penis is concerned. As inamo said, it hits the G-spot; it also fits the contour of the vagina.
However, if you are intent on getting rid of your bend/curve, perhaps you could try hanging BTC with a small rod fitted snug against your body on the underside of your penis. It would seem to me that this would cause the tissue on the upper side, specifically above the post, to be subjected to a more forceful stretch and would grow faster than surrounding tissues.
"Only enemies speak the truth; friends and lovers lie endlessly, caught in the web of duty". -Roland, in Stephen King's The Last Gunslinger