I had a purple spot appear on the glans of my penis about a month ago. This does not itch nor is there pain associated with it. This week two smaller purple spots appeared on my shaft. Same thing, no pain or itching. I had protected sex with someone and the condom came off when I pulled out. She also gave me oral sex later that night. About one month later I was tested for STI and the only thing that was positive was HSV 1. I think this might of been positive from a cold sore I had on my mouth the week prior to my test. There is no puss, no fever, no itching or other symptoms. What could this be?