Quick, fold your hands. Did you put your left thumb on top or the right thumb on top. Now ask the rest of your family and see what they did. Which ever one you put on top is because of a genetic trait you inherited. Try to fold your hands with the other thumb on top and it just doesn't feel right.
Everyone at our house puts their left thumb on top.........
except me, I put the right one on top. The kids got many other wonderful traits from me, just not this one, Dad can take full responsibility for it.
Another trait is if the top of your thumb can bend back more than 60 degrees. None of us here have that trait. Do you?
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