Gestures - Hitchwiki: the Hitchhiker's guide to Hitchhiking - Female hitchhikers thumbs
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Hasn't been studied extensively, and there is little to no data on its prevalence in the United States or worldwide. However, a study found that percent of a random sample of people had. Learn what hitchhiker's thumb is and how genetics plays a role in this condition. Of those subjects, percent were male, and percent were female.