[sdegutis]

I've always associated the word "girl" more with gender than age, so it's very natural for me to refer to a woman as a "girl" when talking to someone informally. On the other hand, in my mind "boy" has a strong association with with age as well as gender, but "guy" doesn't. So "guys" and "girls" are my generic go-to words when referring to someone's gender without regard to their age. I'm guessing I'm probably not an oddity, since I acquired these associations while growing up with mainstream media like most people.

[tamana]

The words are ambiguous and overlap with a lot of sexist and even racist (calling all Black men "boy") behaviors, so it is unclear sometimes if a particular usage is sexist

[michaelcampbell]

I'm much the same, but it drives my wife insane. "I work with a girl..." "WOMAN", "... yeah... that <insert some awesome thing here>..."