system
A chat on subreddit /r/NoStupidQuestions
human
I love how it's "a woman banged a bunch of dudes" and not just "a bunch of people banged each other"

This right here is your answer.
gpt
Because the second one sounds like an inaccurate framing. If the men were only banging the woman, then they weren't banging each other.

Granted, this post is my first time hearing about this and I have zero details, so who knows? But the two are not equivalent statements and I suspect only the first is correct.