I am a 24 years old man and I leak urine after I come from bathroom. After urinating I feel like I still have some urine left in my penis which comes out later on, and I want to mention that I used to do excessive masturbation, I sometimes feel I may have weakened the nerves and muscles of my penis as I don't find the force that must be needed to release or eject all the urines, also I have premature ejaculation (I usually ejaculate after 1/2 minutes of erection, every time I have to hold down or stop my penis from ejaculating) and I think my erection is also below average as the erection does not last for too long. What should I do to eject all the urines so that nothing remains in my penis and also what should I do to stop premature ejaculation and to correct my erection. Thank you.