"Michael, if you were on a date, having dinner with a nice young lady, how
would you tell her that you have to go to the rest room," the teacher
asked.
"Just a minute, I have to go pee", he said. The teacher replied, "That
would
be rude and impolite.

"What about you Paul, how would you say it?" Paul responds "I am sorry, but I really need to
go to the bathroom, I'll be right back."
The teacher responded, "That's better, but it's still not very mannerly to
say the word 'bathroom' at the table." And you Johnny, are you able to use
your intelligence for once and show us your good manners."

I would say: "Darling, may I please be excused for a moment, I have to
shake
hands with a very dear friend of mine, whom I hope you'll get to meet after
dinner." The teacher fainted.