Transgender ideology can take on a comical character, as in a recent American Civil Liberties Union commentary objecting to sales tax on tampons and similar products while pondering: “How can we recognize that barriers to menstrual access are a form of sex discrimination without erasing the lived experiences of trans men and non-binary people who menstruate, as well as women who don’t?”

Yet it’s one thing to claim that a man can “identify” as a woman or vice versa. Increasingly we see a dangerous and antiscientific trend toward...