I don't know how this thing works, putting in excerpts from Judith Butler, and Emma Goldman and they get male. Nietzsche gets higher male than I thought too, in an excerpt from twilight of the idols. I doubt swears have much to do with it, I put in a short story I wrote that had tons of swears and still got about 50/50, slightly weak male though.
I assumed that it had a lot to do with punctuation, run-on sentences, and grammatical indicators of emotion... but I dunno. It should really explain the methodology.