Human sexual orientation is, according to the consensus of the vast majority of researchers in the field of human sexuality, innate. This means that it is pre-determined, though no definitive proof of causation has yet to be discovered.
Being innate does not mean, as so many so ignorantly assume, that any human, at the very moment of birth, desires sex. This argument is beyond naiveté in its juvenile assertion. To assume that any newborn infant instantly and consistently craves sex is ludicrous, at best.
Sexual orientation is innate and therefore pre-determined. Coming to the realization of sexual orientation is developmental, regardless of the defining characteristics of the orientation, itself. Realization of sexual orientation may occur, vaguely, in some of a person’s earliest memory, but not clearly defined. With the hormonal changes which urge humans forward and sexualizes them, realization of sexual orientation becomes a part of self-identification and an indication of the orientation of the individual’s human sexuality for the duration of their lives.
While this concrete realization may come as a result of puberty and the related sexualization becomes of import to the individual during this time, it is not a matter of having suddenly chosen an orientation but simply of growing into the innate orientation that was determined before birth.
Social pressures, for many, dictate that they disguise this fact in themselves, and many will go to extremes in accomplishing it, but it does not change the innate sexual orientation; it merely prolongs the social suffering of the individual and possibly others, as they are unwittingly pulled into the masquerade.
No attempt at altering an individual’s innate sexual orientation can, or will, be successful. Even if brief encounters or short-lived relationships are managed, the innate which is part of our nature will eventually rule out over the façade. Desiring to alter another’s sexual orientation for personal gratification, one opens one’s self to emotional devastation, for this very fact.
Relationships between persons of opposing sexual orientations can never be more than a ruse, and the ruse, itself, can create devastating emotional effects in the lives of all involved. Homosexual men marrying heterosexual women in order to disguise themselves for the sake of conformity risk devastating not only their own lives, but the lives of spouse, children resulting from the pairing, as well as extended families. The innate will eventually command the individual, as duality is not maintainable over long periods of time.
Face facts as they are. Attempting to alter them for convenience, misplaced desire or for the sake of social conformity, and the lie will destroy you.