In this paper we explore the idea of obtaining the two body interaction energies of two molecules using exclusively their electronic densities. For this end, we start with a naïve guess where we assume that the electronic densities of all the molecules in our system are independent of each other, and we later correct this assumption by adding an exchange and correlation functional of the separated densities, very much inspired by the ideas of Hohenberg and Kohn , to universally correct the inaccuracies of the model.