My pet theory is actually that men as a whole are actually bad at sexing people correctly and get fooled easily because each time the topic of trans people came up IRL, men found basically all trans dudes who shaved, wore make-up and feminine clothing passing.

I have seen this in action quite a few times. My own father saw a Tim on TV, who doesn't look anything like a woman (some Tim got his own show on our national broadcast channel) and yeah, basically he just wears quirky mismatched clothes, is a giant man with a massive brow bone and my dad was like "look, this looks like a funny show, she seems funny…" and I was like "Hol' up."

So after that I told him that's a whole ass man, was kinda baffled he couldn't tell (even though I know men suck at this). Every time the ad for that show came up that evening I pointed out his extremely male features (not that my dad didn't believe me, but just wanted him to see how I could tell). There was even an ad where the man is sitting in the car with his mom and he looks comically huge and male next to her. You know, huge skull, huge hands, all that. My dad conceded that it was obvious this was a man (voice gave it away also), and that he just wasn't paying attention. He said "I thought it was just a woman who was, you know, very… unfortunate-looking." I suspect if he had actually watched the show he would have clocked this dude, but even in a 3 second clip it was obviously a male to me. Anyway, it led to a discussion between the two of us about how females, babies, children and animals can all instinctively clock men as a matter of basic survival instinct, but men don't need this instinct so collectively are really bad at being able to tell the difference between men and women. It was a fun chat. Pretty sure neither of us will be watching that show.