Or, to save @Humbabella’s typing fingers, one could just go read Sexing the Body by Anne Fausto-Sterling, which is an eminently readable, yet data-packed (if you read the footnotes for the in-depth experience) book on why every attempt to reduce sex or gender to a physical binary is a complete and utter failure.
(I am fond of sharing her “Phall-o-Meter” in my Sex Therapy class.)
NOT TO SCALE:
