Clearly your premise is severely flawed if you consider the fact that anybody can engage in homosexual activity such that there is no "segment" to speak of... All citizens are treated equally whether or not they choose to engage in homosexual activity.
Either you are not aware of the facts or you are simply arguing for special rights premised solely upon ones ability to declare a preference for or choose to engage in homosexual activity -activity that society has never considered beneficial in any regard whatsoever...
Homosexual sex is a procreative dead end and a societal health hazard -period...
Correct.
Any man, gay or straight, can marry a woman.
Any woman, straight or gay, can marry a man.