First of all, the theory of "sexist language" seems to say that words cannot have more than one meaning: if "man" and "he" in some usage mean males, then they cannot mean both males and females in other usage (i.e. nouns and pronouns can have both masculine and common gender).
www.friesian.com/language.htm www.friesian.com/language.htm
To Avoid Sexist Language ... Sexist language is language that unnecessarily identifies gender.  It can take several forms: ... 4. any other use of language that unnecessarily and arbitrarily makes gender distinctions...
ualr.edu/owl/avoidsexistlanguage.htm ualr.edu/owl/avoidsexistlanguage.htm
Gendered words and phrases like ... Sexist language may matter, but what are some acceptable linguistic alternatives? To subsitute woman for man is just as sexist and yet what other suggestions are being made? Is there some term that can be used instead of "you guys"?
www.alternet.org/story/48856/
Gender-neutral language - Wikipedia, the free encyclopedia
Gender-neutral language , gender-inclusive language , or gender neutrality is linguistic prescriptivism that aims at minimizing assumptions regarding the gender of human referents. For example, t...
en.wikipedia.org/wiki/Gender-neutral_language
I didn't mean to say THAT! Avoiding Sexist Language ... ; Sexist language is language that is meant to include all people, but inadvertently excludes either men or women. ... Why do writers need to avoid sexist language?
courses.cit.cornell.edu/hist100.96/elc/sexis.htm
What is "gender-sensitive language" and why should I use it? ... Kleinman, Sherryl. (September, 2000). Why sexist language matters. The Center Line, a newsletter of the Orange County Rape Crisis Center, pp. 6-7.
www.unc.edu/depts/wcweb/handouts/gender.html
Concern about the use of sexist language is part of our increased awareness that the perceived meanings of some words have changed in response to the changing roles of men and women in our society. For example, girl once meant a young person of either sex, while youth indicated only a young man.
www.rpi.edu/dept/llc/writecenter/web/genderfair.html
Becoming aware of the biases that exist in English is the first step in dealing with sexist language. Perhaps the most important principle involved is that of equal and parallel treatment.
www1.umn.edu/urelate/style/language-bias.html www1.umn.edu/urelate/style/language-bias.html
Carolyn Jacobson, a Ph. D. candidate who studies Victorian English literature, provides this handout about the history of pronoun usage.
www.english.upenn.edu/~cjacobso/gender.html