I am 24 and have noticed these spots on the head of my penis that have persisted for about at least two months now, they don't hurt and I haven't been able to figure out what they are, I went to a multicare clinic and the doctor said it's probably not an std which I really hope it isn't and need a second opinion because he didn't know what it was,they aren't raised bumps they are flat, please help I really need to know what it is