@Surasanji
How strange - my reply inherited your CW. I didn't mean to do that.
Learning about Trans community, CWed for length
@Surasanji So actually, biological sex is not binary either. Not in animals and not in humans.
There are more possibilities than XX/XY.
And it turns out, chromosomes don't always determine biological sex either! See "androgen insensitivity syndrome".
Kudos for being open. There is always more learning to do.