About 10-12 months ago I noticed small (pinhead size), pink, flat spots on my chest and stomach (about 10-20 at a time). They don't itch and they're not painful and they only last for about 24 hours, then they go away. They've been coming back about once or twice a month for the last 10 months, I think in different spots on my chest and stomach but always the same size, shape, and color. When I get them I usually don't experience any other symptoms although I have had a cold once while they appeared. Most of the time I just lift up my shirt and I'm surprised to see them. I do not know what is causing the spots to appear. I a m reluctant to call it a rash because there are so few spots that do come up. I am concerned that it could be HIV infection. I am a gay man. I have never had anal sex before, but I have had unprotected oral sex and I heard it is possible to contract HIV this way. Could this recurring rash be a primary hiv infection and if not then what do you think it is? Thank you.