My son who is 22, Just came and told me, and he was very embarassed that he has some kind of skin thickening on the tip of his penis. He said he just noticed it. He said it doesnt hurt to touch it, but the thick part is really hard skin. Zero redness, zero discharge, he does have hx., of one std about 3 years ago and he is a smoker. I have never heard of penis cancer and I have been an RN for 20 years.