Brain Sex
There is an interesting quiz type thing to do at http://www.bbc.co.uk/brainsex which asks all sorts of questions and then tells you what sex your brain is. I'm 100% female as is my hubby
poliphilo. It's a fun thing to do but be warned that it takes about 3/4 of an hour. There are some other interesting projects on the page - can you tell a fake smile from a genuine one?