A 1953 study done at Johns Hopkins University, one of the first to analyze hitchhiker’s thumb, found that 24.7% of white people and 35.6% of Black people in the United States had the trait. Joint ...

Once home, the habit returned. "Is finger-sucking normal at this age?" I wanted to know. I found out it was not. Fortunately, the problem wasn't serious, but the solution would require patience ...