Hi, I am a 22yr old and back in November I noticed tiny and occasionally itchy pimples on my genitalia. I consulted a medic and he advised that it was probably due to unhygienic conditions an answer i didn't easily accept considering the fact that I have acceptable hygienic practices. Nevertheless, i went through tests including HIV, HPV and prostrate cancer tests and all turned negative. In March the pimples resurfaced but for a short while and disappeared. Later i met a girl- who is now my girlfriend and she developed the pimples too after we got intimate. She also went through all the tests necessary and they turned out to be negative. With the worst fears in mind, I retook an HIV test and it is also negative. What could be my problem?