Hi, thank you for using health care magic. I can understand your concern. Masturbation as such does not produce any sexual dysfunction. It is normal practice in most of the male and no adverse effect have been proven. There is technique called start -stop technique , and squeeze technique which can offer you more control over ejaculation. sensate focus training will help you in getting proper erection and focused intimacy. Try to remain focused on intimacy rather then performance during sexual activity. Medicine like sertraline , escitalopram are useful in reducing premature ejaculation , this medicines are usally prescribed by psychiatrist for treatment of depression but for your condition they are also useful. So i would suggest you to consult psychiatrist for further help if needed. Psychiatrist can also help you out through behavioral therapy in your condition. Hope this will help you. Regards.