[CobaltBlue]

"10% risk of transmission" is the lie. Less than 1% is what the studies show.
http://www.niaid.nih.gov/dmid/stds/condomreport.pdf

[Unam Sanctam]

Sorry, I should have phrased that more accurately, but even if government studies are true (and I for one do not exclude the possibility of political bias in these studies), even a 1% risk of transmission is not "perfect prevention" and is Russian roulette. The study that you cite claims "6.7 seroconversions per 100 person years" are reduced to "0.9 seroconversion per 100 person years" by condom use (I'm not sure if that includes breakage or slippage or incorrect use, which if not would increase the risk even more), and thus use of a condom can produce an 85% reduction in the risk of transmission. But what about the remaining 15%? That is NOT 100%. That is NOT "perfect prevention," as Catherine Hankins, Chief Scientific Advisor to UNAIDS is cited in the article as calling it. That is NOT "safe sex".