What you 'like' on Facebook can be revealing

Clicking those friendly blue "like" buttons strewn across the Web may be doing more than marking you as a fan of Coca-Cola or Lady Gaga.It could out you as gay.It might reveal how you vote.It might even suggest that you're an unmarried introvert with a high IQ and a weakness for nicotine.That's the conclusion of a study published Monday in Proceedings of the National Academy of Sciences. Researchers reported analyzing the likes of more than 58,000 American Facebook users to make guesses about their personalities and behavior, and even whether they drank, smoked, or did drugs.What do your likes and dislikes say about you?

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