But in each case in function only, not in psychology.  The man-woman polarity which controlled all human lives could not exist on Mars.  There was no possibility of "marriage." The adults were huge, reminding the first humans to see them of ice boats under sail; they were physically passive, mentally active.  The nymphs were fat, furry spheres, full of bounce and mindless energy.  There was no possible parallel between human and Martian psychological foundations.  Human bipolarity was both the binding force and the driving energy for all human behavior, from sonnets to nuclear equations.  If any being thinks that human psychologists exaggerate on this point, let it search Terran patent offices, libraries, and art galleries for creations of eunuchs.