Two veins appear ,one on the left and and other on the right and certain smaller veins also tend to appear after mastubration... If i dont mastubrate these veins are not visible... But when i mastubrate these veins are visible... It really bothers me because even after my penis goes back to its original size after erection these veins continue to ahow up. I have been mastubrating for past 8 years not regularly but during weeends.. I ised to have two to three discharges within few hours... Is this normal or any problems with my penis???