As I understand it, HIV transmission rates also vary a lot based on what body parts are being used, and asymmetrically so. related: http://nytimes.com/2014/03/

As I understand it, HIV transmission rates also vary a lot based on what body parts are being used, and asymmetrically so. related: http://nytimes.com/2014/03/15/health/in-rare-case-woman-with-hiv-infects-female-sex-partner-cdc-says.html http://nytimes.com/2014/03/15/health/in-rare-case-woman-with...