Dunno, now that you mention it. There’s some research[1] that correlates word choice and grammatical structure with author gender, predicting gender with ~80% accuracy. Presumably I do something like that without thinking about it.
[1]: Shlomo Argamon, Moshe Koppel, Jonathan Fine, and Anat Rachel Shimoni: Gender, Genre, and Writing Style in Formal Written Texts
[1]: Shlomo Argamon, Moshe Koppel, Jonathan Fine, and Anat Rachel Shimoni: Gender, Genre, and Writing Style in Formal Written Texts