He was not confused about it being co-ed like at all
I once hosted a girls night and, due to miscommunication, our coworker Josh, who was 19, showed up thinking it was a co-ed house party. But Josh was cool, we all liked him, who cares? it's fine!
He was super psyched for a while then slowly seemed irritated and bored. Turns out he thought being the only guy in a room of 10 girls meant he'd get to have sex with all of us that night and "all y'all are doing is baking and doing karaoke and watching murder shows!" Like.... DUDE you watch too much porn.