Which honk is the right honk?

The traffic light changes to green. The car in front of me does not move.
I’m not angry or even annoyed. This can happen to anybody.  I just want him to move.

I want to give him a friendly beep.

I say that a quick double beep is in order.

Others (including my wife) say that a double beep sounds annoyed and a single beep is better.

Which is the friendliest of all the beeps?