sir i have been masturbating regularly 2 to 3 times a day since 7 years my present age is 22. from the last 2 years i have been noticing that my erections are too week and when i tried to masturbate my penis is becoming week before ejaculation. it is taking 2 to 3 trials for ejaculation .i have very good desire to have sex but my penis is not supporting.when i was at 15, i used to get urge to masturbate but now it is not the same.i need to touch my penis for getting erection with most difficulty. i feel that my hand is only helping for ejaculation but my penis is not having enough strength for good sex drive and vigour. i am feeling very guilty about my problem thinking that i may not able to satisfy my wife after marriage. i consulted a doctor in my town 1 year before and he conducted testosterone,urine and other tests. doctor said that all test results are good and no need to worry.he just gave me vitamin tablets(p grape).i took that tablets for about 2 months daily twice(morning and evening), but i found no use of it. in net i searched many websites about this problem saying that its effects are reversible but in my case it is in contradiction.since 1 year i have been suffering from writers cramp problem.i tried some medicines for that problem about 1 month and noticed that there is no change.doctor advised me to stop medication and try to practice with left hand.is there any connection with this writers cramp with my erectile dysfunction, please help me sir. im in a great difficult situation. can i marry or not?