The French have no problem with PDA — they greet friends and family with kisses everywhere. On the streets, in supermarkets, at the gym, at work, etc. There’s no stopping them — they’re kissing maniacs.
But there are subtleties to “la bise” (as this traditional greeting is called) that only the French know.
First, the French don’t actually kiss each other. Instead, they put their cheeks against their friend’s/family member’s cheeks and make kissing noises. There’s no actual lip-to-cheek going on.