I suspect the “Froot Loops” scenario is tackling the immutability question. I may be of some use here:
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“Homosexuality” as a suspect classification (as opposed to however anyone else may use the term in other contexts) has reference to the orientation, that is, the tendency on the part of homosexual persons to find that group of people whom they consider to be romantically and sexually attractive, potential sex partners, boy/girlfriends, and potential lifemates, exclusively or predominantly among people of the same sex as themselves. This condition is in human terms immutable – that is, the near-unanimous testimony of homosexual persons themselves is that they are unable to change their orientation by their own efforts. The orientation, not the “practice of homosexual activity”, is what is immutable. Someone compelled to perform a homosexual act, e.g., in a prison rape, is not “being homosexual” in the “suspect classifications” sense, nor is the fact that many if not all homosexual people can compel themselves to perform heterosexually if necessary for some reason. Just as a valid contract at law presupposes a willing, uncoerced seller and buyer, we are talking about what is chosen when true freedom of choice is available in making this definition. A gay man or woman may find him/herself compelled by social pressure to enter into a heterosexual relationship, but this is not what he or she would choose to do given free rein.
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For obvious reasons, the above does not apply to bisexuals, nor is it applicable if one admits the presumption of the existence and active presence of God and direct divine intervention enabling such change. While the majority of Dopers would regard such a presumption as delusional, I submit that for the purposes of this discussion, its resolution is irrelevant. Whether or not God exists and empowers a handful of so-called “ex-gays” to change, the point remains that they are unable to change under their own power. A parallel to paraplegia may be useful – because there have been a few debatable reports of miraculous healings does not mean that we should not regard damage to the central nervous system causing paraplegia as effectively immutable. Whatever God, if He exists, may choose to do or not do is irrelevant to what people are capable of doing in the absence of His intervention.
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Religion is often regarded as an exception to the “immutability” standard. I submit that it is not. What persuades people to a given belief system is not chosen but something that they find themselves believing by the pressure of external forces and conditioning. While this may change over time with additional experience, it is effectively immutable at any point in time – an ironic counterpoint to sexual orientation.