Hi i have a very sensitive penis head and i am uncircumsized. For the past couple of months i have been opening and closing it and rubbing it and even pouring water on it. The sensitivity has decreased subsantially. However prior to this the only way i masterbated was by rubbing my penis agains't a mattress with the foreskin covering the head. That was the only way i was able to ejaculate. Now i try using my hands and with out the foreskin covering the head. And i end up urinating every time. Is there a problem? How do i fix this??