Homosexuals will continue to breed because bisexuals exist
When bisexual males breed they create homosexuals and bisexuals in a greater frequency then when exclusive heterosexuals breed
https://www.cdc.gov/hiv/data-research/facts-stats/gay-bisexual-men.html
"Gay, bisexual, and other men who reported male-to-male sexual contact are disproportionately affected by HIV. "
Source center of disease control