An economist often plays the role of a tempter. When one says, “I want X,” the economist asks, “How much is X worth to you?” In other words, what other goods that you also value would you be willing to sacrifice for the sake of X?
A transsexual male might answer a similar query with respect to his desire to be a woman, “To become a woman, I’ll agree to have my cock and balls torn off, endure extensive and painful cosmetic surgeries, and saturate myself with female hormones to finish ruining my body.”
That is a mighty demonstrated preference that commands some respect in a perverse sort of sense. No sane “man” would ever do anything like this. So, either transsexuals are mad as hatters, or sexual identity of the body pales in comparison with identity of the soul.