What is this 'of course, sex is not binary' shit? What evidence and research shows this? Seriously, to any of the misogynistic monitors watching (waves), please link this peer reviewed, paradigm changing evidence ...
I think you must mean this illustration, from the new advanced biology curriculum, which has superseded the transphobic nonsense in those obsolete text books we bigoted old farts used, back in the olden days.
I include the second image to illustrate the depths of delusion some of us old fogies are still floundering in, clinging pathetically to outdated concepts fuzzily recalled from school biology lessons. Apparently we are all too old and stupid to grasp the new queer biological science.
In fact, a kindly young person informed me on twitter that the opinion of ugly old hags like myself are now completely irrelevant, and it is a comfort that we will all be dead soon, and the world will be a better place without us.