An old scientific study, no one knows from when or by whom any more, demonstrated, after anatomical testing, that Pierrette and Claude Faugère are carriers of an extra chromosome, the JSDDP: ‘Je suis dingue de palombe’ (in English, the CAWP: ‘Crazy about wood pigeons’). This genetic modification is common in the French south-west and expresses itself in a set of symptoms we shall describe below.