|Can you say "Proustian moment" in Korean? (Image from Wikipedia.)|
"Would it bother you (vous) if we used tu to address each other?"
"How would it bother me? Come on! Joy! Tears of joy! Unknown happiness!"
"I thank you (vous) so much... [I mean,] thank you (te) so much. As soon as you start! It'll bring me so much pleasure that you don't have to do anything about Madame de Guermantes if you want; the using tu (le tutoiement) is enough for me."
"We'll both do it, then."
The wordplay is pretty hard to capture in English, the way the protagonist stumbles from "vous" to "tu." The sense of formality in French culture around pronouns has changed substantially over the past hundred years. In Maupassant and earlier, married couples address each other as vous; now, that would seem laughably cold. Likewise, if two young friends of the same age—like Proust and Saint-Loup—were still calling each other vous after having known each other for months, my impression is that in the present day, it would be hard to call them friends at all.