According to the AP (London) wire, a recent study worked on in part by Cambridge University researcher David Stillwell says clicking the thumb might say more about you than you want people to know.
Facebook says 2.7 million likes are clicked everyday and almost 60,000 US Americans agreed to allow their likes to be accessed and studied. The study determined Facebook likes could point to gender, age, ethnicity, IQ, religion, politics and more. The likes also linked to relationship status, number of Facebook friends, and even pointed to half a dozen different personality traits.
There are ways to make your “Likes” private, even beyond the reach of advertisers and marketers, so make sure if you want to keep this data to yourself, you learn all you can about your Facebook Privacy settings.