To get a curve and to get rid of one requires jelqing with the curve or against it (respectively).
I haven’t done the exercise to see the results yet, but will give it a try. My upward curve is not extreme but makes my dick look shorter than it is, which is rather annoying. However I’m not planning on getting rid of it completely. I have noticed that in 90-degree missionary my curve is just what my girl needs, as it intensively rubs the g-spot and the upper wall. That’s what you need to give her some really wet orgasms. ;D
Anyways, good luck with jelqing, everyone. Lets see if that stuff works.