Reason 1. Scientific evidence does not show that homosexual orientation is, like skin colour, wholly biologically or genetically determined.
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Reason 2. Unlike the impossibility of changing one's race, there are persons who have unwanted homosexual orientation or same-sex attractions and have changed them to significant degrees.
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Reason 3. Medical concerns are not usually closely associated with race; however, persons who act on their same-sex sexual propensities (especially men) do have closely associated health concerns.
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