hi, im currently 18 and i've started masturbating from the age if 16, thou not obsessively, about 3-4 times a week, i've started seeing white smooth substance on the tip of my penis, at the start, it was easy to remove ( wipe off ) but as of recently, it has escalated to an extend that i could even see white 'stains' when i pushed down the excess skin, and i couldnt wash it off in the shower like i used to.. im afraid it would lead to other diseases so in writing in to ask for diagnosis/solutions, thanks in advance, mike