Here we have Vincent Joly (Xavier's dad) explaining Facial Characterology: basically, how to read someone's personality just by looking at their facial features. Hilarious. Love it.
An ear turning on its axis, like this, is a good indication of rebellion - liberals and members of trade unions - those who make demands and are rebellious.
Small eyes, spaced close together indicates an analytic person - not very communicative. Eyes spread well apart, like Emilie, means communicative and not very academic. You, Xavier, your eyes are a bit close, eh (laughing)...
A thick, fleshy nose means someone is sensual, an epicurean.
A forward pointing chin is an indication of will. A small, hidden chin means a lack of will, unfortunately.
A nice, big mouth with full lips and big earlobes = a lot of affection, very affectionate. No ear lobes or small lips means someone is mean, not nice and not affectionate.