No the fact that anyone suffers from HIV, an entirely preventable disease, is disgusting.
Studies have shown that in discordant couples the transfer rate was 0, yes ZERO.
To be fair, thats like saying Pregnancy is entirely preventable, accidents will happen. Hetrosexual couples who use protection and have no intention of starting a family often find themselves pregnant, this obviously involves sperm getting through so unless the survey was very small or the people surveyed very lucky i dont think its very accurate. There are bound to be couples where one person has HIV and despite practicing safe sex has infected the other.