After looking at the picture of erected penis, I feel that there is not a great problem. Such curvatures are known in many makes. If a curvature causes difficulty in penetrating during sexual intercourse, then it needs treatment. There can be thickening of facia of penis at one spot and can cause such bending. It is known as Peyronie's disease.
Next Steps
you may consult an urologist to rule out above condition where physical examination can diagnose the condition