I agree with your assessment. I'll suggest another comparison - the Kinsey scale for sexual orientation. Most adults place themselves on one extreme of the sca

I agree with your assessment. I'll suggest another comparison - the Kinsey scale for sexual orientation. Most adults place themselves on one extreme of the scale or the other, while 20% put themselves somewhere in the middle. Also, my sense is that "spectra" carries with it a 1-D interpretation, which doesn't really fit with multi-dimensional interpretation of gender. The question "Where do you fit on the blood type spectra" doesn't really make sense.