Okay non-French speaking people lemme explain, “Monsieur et Madame” (literally “Mister and Mistress”) is a whole dad jokes subgenre where you present your victim with a surname and the gender of their child, and they have to guess a first name which, when said with the surname, will reveal the dad joke. A classic and very easy one is “Monsieur et Madame Bon ont un fils” (Mr and Mrs Good have a son) and the answer is Jean (John) because Jean Bon (John Good) sounds like jambon (ham).