Physics teachers across the fruited plain are having a difficult time differentiating between boys and girls. So the American Association of Physics Teachers has decided to provide pronoun stickers at its winter meeting, Campus Reform reports. The teachers say the pronoun stickers will “improve inclusiveness” and reduce what they call instances of misgendering. Yes, friends — “misgendering” is now a thing. He might be a she or she might be a ze or a zir or a they depending on subjective, objective and possessive cases.

“Gender can be fluid, and many of the people you will encounter … fall at various places across the spectrum,” read a sign posted online. Now, many of you reading this column came of age at a time when there were just boys and girls. But these days, your God-given boy parts and girls parts no longer matter. It’s all about how you feel. And the latest battle in the 2017 Sex & Gender Wars is something called gender fluidity.

You could wake up feeling like a guy, but by lunch time you could be wearing a pearl necklace and high heels. That’s what they call gender fluidity. It’s the idea that there’s really no such thing as a 100 percent male or 100 percent female. That’s not gender fluidity. That’s what I call gender stupidity.

Loved seeing this at #AAPTWM17 a simple way to be inclusive pic.twitter.com/rzbbj9994c

— Amber (Strunk) Henry (@MissStrunk) February 18, 2017