Topless sunbathing is permitted on the beaches of the Cote d'Azur. You'll see a mix of women with their tops on or off as you enjoy the beaches. The lesson to be learned is not to stare like a schoolboy. Enjoy the sun and let others enjoy it too.
In the South of France, you will see a lot of beaches. Depending on where you come from, you might be shocked to see women sunbathing and showing their naked breasts. It is very common...
Sorry, no picture to illustrate this ;-)