Les Sables d'Olonne is a nice town in France. It has a beautiful beach. Many people go there in the summer for vacation.
People go to the beach and wear swimwear. After the beach, they walk into town. They are still wearing only their swimwear.
The leader of the town is not happy about this. He wants people to wear proper clothes in the town center, not just on the beach.
He asks people to please put on a shirt or a dress. This new rule is about showing respect for the people who live in the town.