From Mike On Ads: Use your web browser history to estimate whether you’re male or female. It looks at the sites you’ve visited, uses the typical demographics for those sites, plus a little maths, to give probabilities of you being male or female.

This simple but clever example gives you a tiny bit of insight into what websites can figure out about you, even if you don’t tell them anything.

For the record, I’m 53% male, which is a little disturbing. I’m going to go check out the Playboy site right now …

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