Combien de bises? The French are famous for their lover's kiss, but they're also common users of the kiss-on-the-cheek-as-greeting kiss. A map created by Bill Rankin at Radical Cartography (h/t Max Roser) shows regional differences:
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The southern regions steer clear of kissing cheeks more than three times, while the northern regions are more likely to kiss four times. Rankin notes that the data is from a web survey, and should be taken with a grain of salt. That being said, don't expect to see a five-cheeked kiss on your next voyage to Cannes.