It is polite, it helps to maintain order in a civilized society, and it keeps the other polite, civilized people in line from beating the snot out of you.
so they can be polite when they go to camp
She was polite as she dismissed him. It is polite to hold the door for others.
I, you, S/he, us, they, them
because its polite
to be kind and do special things for other people
Not all of them are. There are rude french people, just as there are polite french people. Live there long enough, and I'm sure that you will see that this is true.
no
Diplomatic language
He or she is gentle. He or she symbolizes peace.
polite and clear
You should. It is a polite and nice thing to do.