How are you?

How are you? People say
They act like they really care
The best is to answer "Good"
Or else they think you rude

It is polite to ask
It is ok to wear a mask
But impolite to reply
If sad feeling should you imply

What is it? Is it play?
Are we all actors they forgot to pay?
What do we strive to achieve with this pretend?
Is it the first act or is it the end?