Good Manners And Etiquette
Mike replies, "Wait a minute, I'm going to take a piss."
The teacher says, "That would be very rude and improper on your part."
Johnny replied, "Sorry, but I need to go to the toilet. I'll be back in a minute."
The teacher says, "That's much better but to mention the word 'toilet' during a meal, is unpleasant."
So Charlie says, "My dear, please excuse me for a moment. I have to go shake hands with a personal friend whom I hope to be able to introduce you to after dinner."
The teacher passed out.