Hi . I am having sudden ed for last 1 month . Last time I masturbated I had a weird sensation like nerve contraction at the penis (kind of shock feeling) once I have ejaculated . After this incident I am unable to get erection on porn or any sexual thoughts . Only getting erection when I am having  highly simulated sex talk . I have done prone masturbation for 15 years which I found is very bad and can cause ed  . Did I damage any of the nerves ?i don't have any pain at any time.  can some one please let me know why did feel the nerve contraction? It's been a month I am not getting any natural erection . I am getting night and morning erecrion but there are very weak .