Downside curvature

Are there any PE which can minimize downside curvature?

From a theoric point of view, any length excersise should help reducing curvature - just avoid stretching downward. Is your curvature severe? There isn’t anything bad in a curved penis, since when sex is not compromised.

My curvature is definitely not severe, but straight = longer :P

Well, look at the good side : it’s unlikely that dorsal thickening is a limiting factor for you. :)