Quote Originally Posted by Lorraine View Post
Here are few:
Chew with your mouth closed. No needs to hear your crunching.
Never travel in a bus by laying down fully on the seat
Don't use just "k" to say Ok while chatting.
Be quiet while other people are sleeping
Spit your chewing gum into the dustbin after having that.

I agree with all the above points except the bus travel one, This is very new to me, I don't know it's a unwritten society rule.