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Facebook announced today that even though users are now required to specify their gender on the site, it is still possible to "remove gender entirely from your account." The impulse behind the change is part grammatical — a stream of "thems" in the NewsFeed has gotten old, and can now read "him" and "her" — but with the opting-out option in place, it's also a graceful move to acknowledge that, as Facebook product manager Naomi Gleit put it, "the male-female distinction is too limiting." And the tiny checkbox gender revolution comes just in time for tonight's third annual Transgender Pride March in San Francisco. Vive la Différence! (Photo via Genderfork)