oh my god okay so. For one thing. They straight up have words for intersex people. If a word exists, the concept exists. So already they're aware that sometimes bodies aren't easily categorized, so anyone who says "but the romans definitely did have a sex/gender binary" is just self-evidently wrong from the get-go.
They also straight up have words and social roles for people we'd now probably classify under the transfeminine umbrella, the galli. These were AMAB people who voluntarily underwent castration, dressed in women's clothes/jewelry/makeup, and were priests and worshippers of a particular religious cult to the goddess Cybele/Magna Mater, and Attis, her consort. (There is a character in the book who is a gallus! She is the emperor's augur, meaning she makes divinations based on observing the flight of birds. Important person to bring along on a quest.) Here is a statue of a gallus looking extremely cool:
But all of that is sort of.... normal to us? Like we get it, we understand that, we go "Oh, yeah, it's like this other idea we already know about," it fits into our mental model, it does not challenge us to bend our brains in any weird yoga poses.
"Vir" is the thing that will do that. "Vir" is often translated as just "man" but this is bad and lacks the weight of certain encoded subtleties. It is one of two words that means man, the other being "homo" (as in homo sapiens), but the vibes of that one are more generally just "a person (nonspecific)". "Vir", however, has extremely specific vibes, because it is not just "a man" as we would think of the concept today. A vir MUST MUST MUST MUST MUST possess ALL of the following traits to qualify as a vir:
(behaves correctly as a vir)
If he's a teenage freeborn AMAB citizen, he's not a vir (yet). If he's an adult freeborn transmasculine citizen, he's not a vir. If he's a slave or a freedman or an immigrant (aka Not A Citizen), he's not a vir. If he used to be a vir and then got castrated (either by misadventure or as punishment for a crime), then oops he's not a vir anymore, he's a semivir (half-man). If he is a vir but he doesn't act reputably and adhere to the Required Gender Norms, then he's on THIN FUCKING ICE and should stop immediately and get his act together before his paterfamilias disowns him for Betraying The Vir Code.
From the word "vir" we get words like "virtue" (aka the qualities a vir should have), and "virile" (a vir's ability to be Fucking). This is also where we get words like "triumvirate" (a governing body comprised of three viri) -- which, when you realize what "vir" implies, REALLY showcases how unequivocally other genders were excluded from being full participants in government. Couldn't be elected to public office unless you were a vir!
The thing that makes this incredibly *GENDER* is that there were mandatory anxious toxic masculinity expectations forced on the viri that other AMAB people did not have to comply with. The Romans were out here conceptualizing gender as being something that was as much informed by your SOCIAL CLASS as it was by physical sex. So a male slave, freedman, or foreigner could (for example) refrain from shaving his armpits, and it doesn't really matter. Meanwhile, if you are a vir, you DO have to shave at least your armpits to be behaving Properly. JUST ARMPITS. If you shave your legs or your chest or your pubes, then [middle school voice] EW that's Gay. (The Romans' concept of vir-masculinity was very much a VERY FRAUGHT AND TENUOUS AND ANXIOUS attempt to find a Goldilocks zone in the midst of constantly shifting goalposts. If you're not manly enough, obviously that's gay and bad, we still have this concept today. BUT IF YOU ARE TOO MANLY THAT IS ALSO GAY AND BAD. Gladiators??? A super shredded mega-hot gladiator who's drowning in pussy? The viri are like, "Gay. Gay of him. Unmanly. Effeminate. Ew yuckie no no no." We do not have an upper limit on "how much masculinity is good" in our culture, we sort of think "the more the better" and that's why everyone's horny for a lumberjack.)
A lot of the time people are like "The Romans didn't have homophobia! They only had bottomphobia :D" but actually they DO have homophobia once you account for the fact that "vir" is a separate gender from "servus" (male slave), "libertus" (male freedman), or "peregrinus" (male foreigner/immigrant/other non-citizen), etc. A vir can fuck any of those genders, AND any of the AFAB-aligned genders, AND the galli, AND intersex people and that is perfectly fine and normal and Roman Heterosexual of him. Why is it fine? Because the default cultural assumption is that the vir will be topping. A vir absolutely must top, viri who do not top get mocked and made laughingstocks in satirical plays. This is catastrophic to them. They would genuinely prefer to die in battle, even though it's kind of gay to get stabbed when you think about it because that's basically another man penetrating you????? Cringe. Cringe and effeminate to be stabbed.
Actual Roman homosexuality would be a vir fucking another vir--someone of his own gender. This absolutely cannot happen, because then [GASP] ONE OF THEM WOULD HAVE TO NOT TOP. Morality crisis. Philosophers throughout the empire are clutching their pearls and scribbling the ancient equivalent of Reddit posts about how one time they heard about a guy (vir) who fucked his friend (another vir) and it's Probably Because Of Moral Bankruptcy Such As This That Society Is Collapsing Before Our Eyes, We Live In The End Times If Viri Think It's Okay To Kiss Each Other With Tongue, The Only Thing Morally Worse Than This Is How All the Twinks Are Becoming Gold-diggers (we can't get into the twink golddiggers panic of the 2nd century right now. it's about the viri buying twink boytoy sex slaves and then leaving them their entire vast fortunes in their wills when they died. Seneca the Younger had a Reddit tantrum about it)
basically the Romans did not INVENT toxic masculinity but they did perfect it and raise it to an art form. absolute slapstick comedy clown shit. Don't kiss your wife in public, that's gay. Don't fuck too much. Don't fuck too little. Don't fuck other men's wives. Don't chase pussy. Don't be too fashionable, don't be too unfashionable, don't belt your toga too tightly, don't scratch your nose in public, DEFINITELY do not be an actor, do not play music or dance in public. You can be an orator but that's still a bit sus tbh, because it's LIKE performing in public like an actor, and that's BASICALLY the same as prostituting yourself. Don't comb your hair too much. don't comb your hair too little. Don't be unkempt. Don't be too well-groomed.
[holds up the viri proudly like a naughty cat, stinky bastard man] they are making themselves miserable every day of their lives and that's one of my favorite things to watch a man do <3333 read my book. look at it on kickstarter
this is sincerely only scraping the surface of Roman gender nonsense and how absolutely fucked up these guys were. And i CANNOT get into stuff like how manumission (an enslaved person being voluntarily given freedom) was treated with rituals and attitudes that kinda make it feel like a gender transition process (you get new social roles, you get new expectations, you are washed clean of any "necessary shame" you might have had to endure, a sharp line is drawn between your old life and your new life). I also can't get into the Twink Genders right now or this will be impossibly long (twink is a roman gender, and there are multiple sub-genders under the twink gender umbrella ("puer" "exoletus" "pathicus/cinaedus" etc))
and you thought having a lot of genders was a new modern thing. no no. lol. lmao even. go read Roman Homosexuality: Ideologies of Masculinity in Classical Antiquity, it will give you SO many more cool facts about these fucked up lil guys if you don't want to wait for my book (though the author, a presumably cis man writing in i believe 1994 doesn't have the "ohhhh wait this is GENDER, this is ALL GENDER, this is just GENDERS ALL THE WAY DOWN" epiphany that i, a nonbinary person on tumblr in 2026, am predisposed to perceive)
people should also ask me about the Latin Fuck Verbs sometime.