"It’s funny, but telling, that those who claim that sex is a spectrum or continuum never specify how many sexes there are, either in humans or other species. I suspect that if they responded—based on their “multivariate, multidimensional” definition of sex—that “there are many, many sexes,” or “I can’t answer that”, they would be laughed out of the house. But we all know that that the “spectrum” people are not dumb or willfully ignorant. They are simply imbued with a certain ideology."
Jerry Coyne

January 1, 1970