OK, I'm nitpicking.
But I studied in a Jesuit school, and we spent a few zillion hours understanding grammar. And a subset of those zillion in understanding antonyms and synonyms.
And when Outlook magazine's e-mailer referred to "men" in opposition to "girls", it jarred.
And I checked with Roget's.
The antonym of man is woman.
The antonym of boy is girl.
The antonym of men is not girls.
End of post.