The punching is usually done by girls

Brinton’s world was a man’s world.

Here, he’s not writing about boxing. He’s discussing the menial jobs done by “girls”.

In the book, the word “man” or “men” appears well over 100 times.

Woman/women? Zero.

Girl/Girls? EIGHT times.

Check out this page on executives to show just how strong this opinion was (go read it here):