https://epochemagazine.org/eros-and-thanatos-freuds-two-fundamental-drives-50a82a11a389

For now we can summarise the dynamics of Eros and Thanatos as such: Each living being has an inherent tendency towards self-destruction, the dissolution of its own unity. But right from its conception, libidinal energy is injected into it from the outside until a certain level is attained, where, due to the pleasure principle, the living being feels the urge to channel its libido to the outside by using another living being as its object and passing on its libidinal energy. That way, the object’s tendency towards self-destruction is neutralised.