@CyanoticWasp You seem to be assuming that this is a “choice” issue. Do you recall how old you were when you “chose” your current sexual orientation? Diverting of course a moment, there was a time way long ago where I was not so sure, I guess one could say I was in a confused state. However to some it appears to be choice, Anne Heche one of the most famous switch hitters would allude to different thinking. When Cynthia McFadden (I believe) did a special on women in prison it was said that 80% of women who are in prison and know they will be there doing long time have at least one homosexual encounter and many more straight women end up having same sex lovers behind bars. It can be said they chose to be with a woman when they knew being with a man was out of the picture for the next 30 years or closet lesbians are prone to criminality.
But the question was not one of choice, it was to say that everyone became Gay, something in the water, spores in the air, whatever the world cease to have straight people. Would there still be division when there were no more ”different” people sexually? It would seem that it would be one great big happy tent party but would that just shift the division from full Gays against bisexuals and visa versa, that is the real question or gist of it thereof, not choice or not choice.