On Sitting Straight

1. Why do people sit straight? By habit. To be attentive. To show respect. Because they are in a classroom or training room or meeting room. Because others around are sitting straight.
2. Why do people think when they have to sit straight? Because they wonder why should I? or Must I? or What if I don't? or What the hell! or Crazy people. or Hey man come on let me.
3. Why do people sometimes adjust to sit straight? Because they are feeling sleepy. or Because that is what they should be doing. or Because they have slumped down. or Because others around are sitting straight. or To show respect or out of modesty.