Is upward curve desireable?

I’m wondering if I’m wasting my time trying to straighten my mild upward curve to gain more length naturally.

I have been training mine to do what you are trying to do away with. So far I have had some success. Want length measurements? Just measure with the curve with a tape ruler. Upward curve hits the G-spot better and it just looks more aggressive, healthy, and ready to go. MXL