Many men who experience tears or cuts in their penis skin find that they appear quite suddenly, without any obvious cause. Often, they occur in the hours after sexual intercourse or masturbation, even when no rough play or aggressive handling took place. The appearance of a red penis, as well as swelling and a whitish, paste-like substance often accompany the cuts. In most cases, the explanation for these symptoms is simply a Candida yeast overgrowth. Yeast infection is common in men, as well as women, and the tears may be one of the first symptoms to appear. At first you have to consult your family doctor to rule out any std or other infections.