French gesture: faire la bise
La bise or le bisou means kiss: French family and friends exchange kisses on alternating cheeks upon meeting and separating.
Greeting friends with an exchange of kisses is perhaps the most essential French gesture.
The number of kisses and the side that the kisses start on vary mostly by region and by some other more obscures factors. Two bises (one on each cheek) is the most common.
Whenever two people don’t faire la bise as a greeting, they shake hands.
This type of kissing is common in many other cultures, like Italian and South American.