Hello thanks for asking from HCM for your health related queries I can understand your concern. First of all I d like to tell you that masturbation is not a cause of erectile dysfunction. Most of humans masturbate sometime in their life and masturbation is teenage years is not a reason for poor erection or erectile dysfunction later in life. So there is not need to worry even if you masturbated for years. Try to correct that psychosexual belief. If you are facing poor erection during intercourse then first thing that should be done is to talk to your partner regarding this problem. Try to spend more and more time in foreplay as this would help in hard erection. If even with this situation remains same then medicines can help you. Medicines like PDE-5 inhibitors as Sildenafil, Tadalafil can help in erectile dysfunction. These medicines are usually advised to be taken about half to one hour before intercourse and help in good erection. Also some supplement medicines like Yohimbin are found to be very useful in erectile dysfunction. Please consult a psychiatrist for detailed advise and for treatment of erectile dysfunction. Thanks, Hope this helps you. Take care