system
A chat on subreddit /r/NoStupidQuestions
human
If you're in the UK, we'd use Fanny, hence the confusion with the American terminology for ass!
gpt
“Fanny” in the US is a very quaint and old-fashioned term for the ass, something parents might teach their kids to say if “butt” was considered strong language.  

Is it still used in the UK as a relevant term for female genitals?  Is it considered vulgar? Because now might be the time for that word to make the definition switch here in America, like I can imagine little kids using it as a nicer euphemism for the vulva.