Then all sex would be hetero
From universal mandatory sex-change therapy? How?
Or do you assume that homosexuality, for instance, is exclusively due to the homosexual's sex and gender differing from each other? That's not the case. Pre- sex-change therapy homosexuals remaining homosexual post- sex-change therapy abound. (Now his sexuality is toward his post- sex-change therapy sex rather than toward his pre sex-change therapy. (Toward which it pre- sex-change therapy was.))