Paris for the Parisiens?

The past week, I received a visit from a very good Brazilian friend and as it was his first time in Paris, we did the whole Eiffel Tower, Champs Elyssee, Saint Michel, etc tourism. One of his comments that I found interesting was that the people he was seeing in the metro and other public places did not look very French. I immediately responded that he is completely right because the Parisiens are long far away for their holidays.

Most of the world knows Paris and would like to visit or live in Paris: La ville de l'amour! However, now that summer began and with that the student holidays, Parisiens are all away, leaving the hordes of tourist behind. Because of this invasion of tourists, Paris does not feel to be empty at all. The metro system is fuller than ever, as well as the streets and squares. I guess this is normal for touristic cities, such as Rome, Paris, London, etc.

This is very curious for a Brazilian because for vacations we usually go to the beach, leaving our cities completely empty. Furthermore, the people that are in the costal cities do not go to other cities but just overcrowd even more the restaurants and bars near the shore. So it is very seldom that a Brazilian city is full of people that do not live there.