And... we have an idiot that cannot distinguish between science and politics.
Human sexuality is something that exists, and the various labels are simple try to classify it (in broad classes), but reality has always for every classification you can think a good number of exception that falls outside of it.
In reality, everything you know is not always what reality is, or in simple words: the real world is more complex and weird than whatever you think you know, and probabilly the best thing to do is stop labelling or forcing label on everyone and treat every person as a different and unknow situation.
And yeah, there's a good number of people that want to be acknowedged as a different thing than her biological sex at a very deep mind level, or that don't like to have romance or sex with others in general, or ... the list is very very long. Every one of us needs simply to accept that, and don't forget that every other person has the same value as us, and need the same respect.
This manga is interesting (as for example, the starting of bloom into you) because is exploring this more weird and unique peoples, including a person that don't want to be acknowedged as woman or man, and it's its full right that other respect this.