The whole blogosphere is talking about The Gender Genie, which is a web site that can tries to tell your gender from a writing sample. It was pretty sure I’m male (let me state for the record I’m certain I’m male). I have a much easier test:

Do you take reading material when you plan to sit on the toilet?

Yes: You’re clearly a guy.

No: You’re clearly a gal.

If this doesn’t work for you, perhaps you should consult your parents and find out if you were one of those rare births with, as the doctors say, ambigous sexual organs.