[cheekopekman]

How often have you held the door open for the person walking immediately behind you, but did not even get a response such as "Thank you" for your considerate act? Most people simply look through you as if you are not even there.

Why must you hold the door for the person behind you leh?  You might be treated as a doorman lah!  Must you thank the doorman leh? That's his job lah!