I think we, or most of us, agree that transgender athletes should compete against others of their biological sex at birth. What Zerks’ inconsiderate meme implies is that transgender people feel any different on those two days than any other day. A transgender acquaintance of mine told me they can’t begin to figure out how to change how they feel, and trying to imagine if someone told me to feel like and be a woman, I can sympathize. It caused me to research it. Turns out there’s much more than plain X and Y chromosomes at work, and it’s been scientifically proven. It’s not common but definitely true; gender identity and sex are not one and the same. It’s not psychological, it’s physiological.