The inherent function of sexual attraction is reproduction of the proverbial "selfish genes" as it were, and by extension the species. Since attraction to the same sex isn't the most conductive thing for reproductive success it is, alongside the lack of desire to have offspring at all, effectively a "glitch" and an inherently rather self-limiting one.
Which is why, looking at assorted surveys listed on teh Wiki, homosexuals make up something like under 10% of the population.
Necessary reminder that it's not a "stupid ass idea" but the norm already out of brute biological calculus.
Now, whether an author handles the matter well is another question entirely...
last edited at Jul 22, 2018 11:25PM