If your sexual partner had HIV and did not tell you about it, how would you feel? Most of us would feel betrayed, lied to. We might be scared that we’d contracted the virus, too. If we had known, maybe we would have chosen not to have sex, or might have taken different precautions. Perhaps we’d be angry that someone took away our ability to evaluate the risk for ourselves, and instead decided for us that the sex was worth the risk.