I have this white puss looking pimple on the side of my penis. It is only one and it does not hurt or itch. It has came out before and its always only one at a time. It happens every 3-5 months or so. I was wondering if it was an std or something. I have read some past comments but they say that they have more than one. I only have one so I want to stop being worried and get a good reliable answer. Please help! I am still a virgin and never had any sexual activity. I do masturbat though but don't concentrate so much on that but can I see the causation of this?? Thank you and you can tell I'm anxious to get an answer