I have had tiny bumps on my thighs that appear to be pimples or just ingrown hairs. Lately since i started a job involving lots of walking and sweating it has began to spread to my pubic region and the penile shaft. There are about 4 or 5 of them so it's not massively spreading, it's just concerning me considering i have only had 2 sexual partners in the past 2 years and both have been checked multiple times and are clean of all diseases and I have never had any diseases either. They do not hurt just look like tiny white heads that I would have gotten when I was a teenager and there is no itching burning or blistering. What could this be?