Buzzer

You can guess
Who's at the door
By the way
The buzzer's pressed
The grand-dad after climbing
Two flights is so winded
He can hardly wait,
Never takes his finger off;
The children returning
From school or tuition classes
Do not trust the bell
To get the door open
They will knock it down
If you do not hurry
The salesman often fools you
With an authoritative burst,
It is the breadwinner
Who knows his home-maker
Who pauses between rings
And worries if she is not answering.