Femininity is the domain of females only. If a male attempts it then it is a pale and shallow comparison and a rejection of his natural state.
To imply that those individuals that claim to be intersex challenge the sex binary is indeed saying that there are not two distinct sexes. It is an either/or equation.
The gender binary is quite constant and natural. You are either male or you are female and anyone that feels that they are somewhere in-between is confused and possibly deranged. Those of us that do feel that they’re somewhere in the middle feel that way as a result of hormone imbalance, social indoctrination, or both. A female that is masculine simply has too much testosterone in her system just as a male that is feminine has too much estrogen in his system. Like any affliction this can be solved with medical treatment to restore the imbalance. Those that are socially indoctrinated were dealt a severe injustice and can overcome the abuse with counseling like any abused child.
There are only 2 sexes, which are male and female, and that is the way it has always been.
Cassandra