As to please and thank you, when my kids were growing up I simply affected not to hear them unless I heard a "please", and revoked a positive answer if there were no audible "thank you".

It worked a treat and both my offspring now use it to good effect on the grandchildren, as do I when occasion demands.

It only takes a few days to get the message across, followed by the very occasional reminder when needed.

I once successfully used it on a really exceptionally pig ignorant employer (although I did have to explain to him WHY I didn't "hear" him). To give him his due, he took it well and we are still friends.

Don T.