[Biochemistry of Eros]

Analytic study of the biochemical factors in the process of pareunia: hormonal factor of embryonic genital crests, responsible for a double sexualization, both genital and encephalic, which stands for the exteriorization of a perfectly determined later behavior; attractive or repulsive exoactones (pheromones) which play a major part in inter-individual attraction. Study of those many exoactones in both sexes; hormonomediation, leading to the intervention of the hypotalamo-adeno-hypophyso-(cortico)-gonadal axis, with such effectors as sexosteroids, the hypothalamo-adenohypophyseal with the prolactin, the neuro-hypopheseal level (vasopressin, ocytocyne), and the epiphyseal level (melatonin), the terminal effector agents appearing either as libido (androgens, P-Rih), or counter-libido (oestrogens, prolactin) with the involvement of two systems of vertical and horizontal libidinization; neuromediation, with the intervention of the catecholaminergic, cholinergic, indolaminergic (serotonin); neuromodulation, with a rise in the endorphin rate when there is an orgasm; very precise enzymatic phenomena (depolymerases appearing in the vaginal content when there is an orgasm), which cannot be ignored any longer.