If HIV-negative men were more assertive about their status, they could take on a fairer share of responsibility in regard to HIV prevention. HIV-positive men have their own status to manage. It's not their responsibility to manage yours too, but it seems that they're expected to do so.
When we avoid talking about the issue of HIV/AIDS, we push it back into the shadows. In those shadows is where HIV/AIDS does more damage than it can ever do to a community that is vigilant about addressing both the virus and their experiences surrounding it, regardless of HIV status.