Sir actually im rubbing my penis upto shaft to glans very hard,,,because im practising holding ejaculation with out coming out ,,2 days im trying ,,after my penis feel slightly numb ,,i dont have any ed,,im good ,,my queastion is does its nerve been damaged in my penis?becuase now im successfully holding ejacuation than before>>??but some numb feelingin my penis//does it good though?i seen in online many posts blogs showing ,it was a penis numb dorsal nerve damage talking like that