But there is Breast cancer....
Breast cancer strikes married women as well, and also unmarried non-homosexual women. It doesn't, to my knowledge, prefer homosexual women over others. Compare this to AIDS which infects homosexual men at something like 100 times the rate it affects normal men. Moreover, we haven't yet figured out what triggers breast cancer, so drawing any conclusion based on a small difference is dubious; whereas the means of transmission of HIV and the factors that facilitate it are well known and unmistakably attributable to sodomites.