[philthy]

Etiquette is the rule of good behaviour.

For example, when visiting a friends house you shouldn't pick your nose and then wipe your finger on the curtains while his wife is in the room.

A Gentleman always waits until she leaves the room to make him a cup of tea, before deftly sliding the appropriate finger down the side of his chair and removing the offending matter by twirling his finger around on the carpet.

Now do you understand?