The problem with making unnecessary inaccurate statement is that it gives the enemy an easy shot at dismissing our legitimate arguments.
You will be more effective if you show yourself to be knowledgeable on the subjects upon which you comment, rather than be easily refuted without having to get to the merits.
I think that for the purposes of this particular discussion you are nit picking.
Males with Klinefelter syndrome are still males.
For all practical purposes, among human beings, there are two sexes.
However, suit yourself.