What\'s \'natural\' is really a perspective thing.
Sex is a blessing upon humans with which we can use to have pleasure, not merely reproduce.
It\'s like saying masturbation is unnatural. You\'re bringing yourself to orgasm, despite the fact that you\'re not impregnating anything. Being considered \'natural\' is merely the perception and \'acceptance\' of the population, or more importantly, yourself.
Though I just realized you said this; "considering the vast majority of the world is not gay", which may tie into what I\'m saying.