Some such unwritten social commonsense have been published.
- Never eat words. The sting of your bone is cheating for others. Make a habit of eating slowly and eating habits.
- When someone else speaks, do not stop him from talking to him. Talk to someone else after finishing it. Talk with your eyes and eyes.
- Talk to your restaurant waiter, liftman or a salesman or car driver in the shopping mall, who are serving you with them.
- Do not drop it where you eat chewing gum. Put on the paper or tissue in the dustbins.
- Never tie your bike lock or lock with another bike in the bike parking.