Nothing is bad about it.
Also its a technicality but homosexuality does not render one incapable of reproduction, but obviously being in a relationship with someone of the same sex they don't generally put that ability to use.
Some gay couples still want to be parents though but they can adopt kids, and with increasing technology there are other ways to have/create a baby than intercourse. Currently that mostly extends to things surrogate parents and sperm banks and such services infertile people use to produce offspring...but I imagine its possible homosexual couples could resort to those kinds of services as well.
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We won't go back.