I read that in some third world countries it's mostly all hetero WOMEN who are contracting AIDS and it's from their HUSBANDS having had lots of sex with prostitutes before and during their marriage.
http://www.aegis.com/news/ips/2001/IP010201.html
http://www.peak.sfu.ca/the-peak/96-2/issue12/aids2.html
quote from above article
"For many women, being in a monogamous relationship is actually the greatest risk of infection"
Also, there are more total # of women having anal sex with their male partners than gay guys getting it from their partners so women are more at risk.