There are a multitude of emotional expressions that play across a baby's face. The adult in front of him recognizes these expressions, identifies them and transfers the sense to the baby, which the author calls 鈥渢rans-subjectivity鈥? The emotional freedom of the parent and the baby allows both to run the gamut of emotions and for the child to little by little understand them. On the other hand when the privileged relational partner of the baby is herself caught up in the freedom of her emotions, constantly fixed on a particular emotion, there is a risk of taking from this rich and varied gamut of emotions only those which more or less fit with her own problems. This privileged attention given to a specific expression risks giving it an overly important role. This in turn leads to the unconscious transmission of this type of emotion to the child, which is always fascinated by that, which interests the adult. Some clinical examples show how this pathological transmission of emotions could occur without either of the partners being aware of it.