I have been masturbating since I was 13, but wasn t doing it too much. In the last couple years I started doing it frequently and about 5-6 times a day, and then stop for a day and then come back and do it again 4 times. I used to have a really strong erection in the past, and I used to get excited and get erection easily. right now it s so hard to do that and my penis gets bigger but not strong enough, andd my erection doesn t last as soon as i take my hands off my penis. I checked with uroligist and they said all the test and testosterone level and everything else is fine, so what s the problem and what can i do to fix it.