What really causes HIV transmission?
Transfer of bodily fluids from an infected person to one not yet infected leads to HIV infection. The virus cannot survive for more than a few seconds outside of the human body, without strictly controlled conditions. This is why sex with condoms is considered safer; there is less chance of the fluid transfer to occur. If you are talking about behaviors and attitudes that make it more *likely* that HIV will spread, I would say that anyone who doesn’t take the risk seriously would be a danger to all of their partners.