In the Anthropology, the person has a self-organizing communicative structure, so person cannot be unique, lonely. This has been called by Polo: "Coexistence". It shows that the "Díada" (Duality) is richness, plenitude (fullness). This makes possible to mark the difference between two complementary person's types: the male person and the female person. They could be called: "coexistence-from" and "coexistence-in".