Hello, I am hoping you can help me, looking for a second opinion . Like the guy that caught a zipper on his penis. The top but of my shaft just under the helmet part, the skin tends to crack open during sex. I think part of it is form the friction and getting larger. My physician says there is nothing I could do, he suggested I trying putting vitamin E on it to help with the healing process. Have been to a dermatologist he suggested some creams, both methods helps for while, but when I have sex the cut tends to open back up. I have been tested for diseases, came out negative. Is there anything I could take or put on that would make my skin there get thicker or at least heal where it wouldn’t break open?