'Oh...these French and their language' by K.J.S.Chatrath

A French man arrives home unexpectedly early from the office to find his wife in the arms of a lover.

"Madame," he says. "I am surprised!" 

The wife replies: "No, Monsieur: we are surprised. You are astonished."

Exact use of language is so important!

Source: Mary Kenny: Cracking le code of French conversation: Understanding the secret rules of French conversation is quite an art

 http://www.independent.ie/opinion/columnists/mary-kenny/mary-kenny-cracking-le-code-of-french-conversation-35124629.html