Originally Posted by london
There has been more than one time throughout the history of mankind when more than 90% of a population has shared an opinion or belief, and then been proven to be wrong for holding that opinion, or had their belief rubbished by science.
But in this case it's simply a question of erring on the side of caution.
No-one has ever died (I don't think anyway) from someone saying, "sorry, but I don't want to have unprotected sex with you" or "sorry, I don't want to have sex with you". Unfortunately people have died from saying "yes, I will have unprotected sex with you". This is really not an arguable point.