I have this white matter attached to the head of my penis. Assuming it was yeast, I tried anti-fungal cream, potassium sorbate, colloidal silver, and tinactin. the only thing that seems to help is scraping it with a pocket knife. yes, some of it will scrape off but never all of it. Sometimes I can peel up a patch of it that I can grab with tweezers and pull the rest of the way off. This never hurts or affects the skin underneath. it's kind like calluses, hard and firmly attached to the skin. NO, IT IS NOT CALLUSES. It's white and looks like smegma but is hard and attached. Any ideas?