Hi, Thanks for posting in HCM. I understand your concern. Masturbation is a physiological phenomenon and it doesn t make your penis weak. What problem you are facing is mainly because of psychological issues and you are having difficulty in sustaining erection along with premature ejaculation. Kindly practice pause and squeeze technique as part of behavioral therapy which will help you to sustain erection and get more confidence. You can also delay ejaculating early with this technique. You can supplement initially by taking medications which improves blood supply to penis like Tadalafil. Practice meditation to bring down anxiety and keep your mind calm and healthy. Hope the information provided would be helpful. All the best.