In spite of 'psychology, psychiatry, biology and sociology' not knowing what causes homosexuality, you claim they can determine the normalcy?
Do you really think anyone believes that nonsense.
In your example, scientists admit they don't know.<quoted text>
We don't know what causes gravity either, but we accept it as normal.
Your move, my perineum...
In my example, scientists deny they don't know, a clear violation of scientific proof.
Not only does their assessment of homosexuality become meaningless, it exposes their ignorant prejudice.