Etiquette

During a good manners and etiquette class, the teacher says to her students :

"If you were courting a well educated young girl from a prominent family and during a dinner for two you needed to go to the toilet, what would you say to her? "

Mike replies : Wait a minute, I'm going for a ***.
The teacher says : That would be very rude and improper on your part.

Johnny replied : I'm sorry 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.

And 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 to you after dinner."