For anybody who spends some time in France, of course, the deepest of all mysteries is: how many kisses am I supposed to exchange on greeting someone?
Now, at last, there is at least a geographical map, showing the preferred number of kisses for each departement. There are of course additional levels of complexity (according to social factors, occasion, time, fashion, sheer random chaos ... ) but this map is a start. Wonder how long it takes before it is reprinted in the guidebooks.
I tend to do two, and rely on people to tell me if they need more :)
I found this link in an amusing Guardian feature about how Brits struggle with the shift towards more intimate greetings ...