Explain that while we enjoy affection, if this affection will lead to an automatic relationship it's better to keep it slow.
If someone you are dating in France is being very reserved with touching, understand that it's a respect.
and it is also normal for us to date more than one person during a period of time.
It's not a 'tie down' or a concept that you are automatically exclusive with a person.
In the States we discuss serious relationships after quite a few dates; kissing, affection or hugging are normal in dating..
In the French culture kissing/affection is considered something big- often shared between boyfriends/girlfriends that are exclusive.
First, it's often rare for two people to go out alone... Second, affection is saved for a 'sure thing'; if kissing is started it's considered as if there's something between the two people and beyond three it's considered like an exclusive thing...
It will only lead to broken hearts and misunderstandings...