Sometimes, the way in which you form paragraphs and sentences can give away an individuals gender identity. Check this out, and the accompanying paper.
Female Score: 8
Male Score: 14
The Gender Genie thinks the author of this passage is: male!
http://www.bookblog.net/gender/genie.php
http://www.cs.biu.ac.il/~koppel/papers/male-female-text-fina...