During class, a teacher trying to teach good manners asks the students, one by one, "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 bathroom?" she asked.
"Just a minute, I have to go piss."
The teacher replied, "That would be rude and impolite! What about you Sam, how would you say it?"
"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 nice to say the word bathroom at the table. And you Johnny, are you able to use your intelligence for once and show 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."