Yea. "Female" and "male" don't sound weird to me in themselves. I don't see then as in a different category of words than "women" or "boys". But using it in an inconsistent way would be weird to me as well. If in a class, the girls, or women, are in the same age as the boys, or men, then it should be either "girls and boys", or "women and men". Or "females and males". But "females and boys" is just inconsistent.