sitting upright

What is the seat posture revealing about your personality?
have you ever wondered what the sitting posture is about your person or personality? choose a familiar sitting posture and see what it represents about your personality, the person sitting opposite.
This is why Japanese people often do not lean on their seats when flying
in order to be comfortable on flights, we often have a habit of leaning back on a plane, but japanese people often don't. why so?