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Also, for anyone saying "but chromosomes/ reproduction/ genitalia = what makes a (fe)male". Nope, sorry gender doesn't work like that.
Not to mention people who aren't XX or XY (see first link) and people who aren't intersexed but are simply impotent (do I really need to source this?).
Now stop being so transphobic, Newgrounds. Also, I might write an essay on this when I can be bothered.