My teen son is dating a French teen girl--HELP!

My thirteen year old son is dating a girl whose parents are from France. Her mom seems to realize that this is only puppy love and has giver the ok. Her father, however, is violently opposed. We live too far away from them for the kids to hang out in person. Now that school is out, they just talk on the phone constantly! So...is the father just a typical "I don't want my daughter to date until she's 30!" type of dad or are there some different rules for French teenagers? (if they can drink wine and go to the beach topless, why not let them date???) Just thought I'd check! If anyone knows, please tell me!

Thanks!