Why You Shouldn't Refer to Women As "Females"
I know a guy who is always referring to women as "females." And for some reason it always just made me feel uneasy. He doesn't do it in a negative way and it's not a pejorative for him. But it still sounds wrong to me. And I would never do it. So I did a simple search about referring to women as "females," and I came up with a few things. Apparently, I'm not the only one who isn't thrilled with it. There is a list of reasons why you shouldn't do it.
"Female" is a scientific term that refers to the sex of a species that is capable of producing children. The term "woman" refers specifically to human beings, while "female" could refer to any species.
Here's more. They also mention that you never hear women referring to one another as "females."