i noticed within the last couple weeks these spots suddenly appear on the shaft of my penis. it started of as one that looked like a pimple but harder. then when the skin is taught more appear as a cluster o. the underside of the shaft. I've looked around and HPV or Fordyce spots make the most sense. I've had sex in April with some one that I've had no issue with in the past and told me was tested clean. it can be either in my mind. thoughts?