Though, I encourage everyone to read "Feminism and the English Language," which can be found in volume 013, issue 24 of the Weekly Standard, in its entirety, I must place this excerpt on my blog.
"The driver turns on his headlights" is not about a male or female person; it is about a driving person. But "the driver turns on her headlights" is a sentence about a female driver. Just as any competent reader listens to what he is reading, he pictures it too (if it can be pictured); hearing and imagining the written word are ingrained habits. A reader who had thought the topic was drivers is now faced by a specifically female driver, and naturally wonders why. What is the writer getting at? To distract your reader for political purposes, to trip him up merely to demonstrate your praiseworthy right-thinkingness, is a low trick.
White's comment: "If you think she is a handy substitute for he, try it and see what happens."
Sometimes a writer can avoid plastering his prose with feminist bumper-stickers and still not provoke the running dogs of the Establishment by diving into the plural whenever danger threatens. ("Drivers turn on their headlights.") White's comment:
Alternatively, put all controversial nouns in the plural and avoid the choice of sex altogether, and you may find your prose sounding general and diffuse as a result.
But the real problem goes deeper. Why should I worry about feminist ideology while I write? Why should I worry about anyone's ideology? Writing is a tricky business that requires one's whole concentration, as any professional will tell you; as no doubt you know anyway. Who can afford to allow a virtual feminist to elbow her way like a noisy drunk into that inner mental circle where all your faculties (such as they are) are laboring to produce decent prose? Bargaining over the next word, shaping each phrase, netting and vetting the countless images that drift through the mind like butterflies in a summer garden, mounting some and releasing others--and keeping the trajectory and target always in mind?
Throw the bum out.