[Solved] Describe the causative agents and transmission of tuberculosis. Libido: In psychoanalytic theory, a term referring to the energy derived from sexual instincts and desires that drive individuals in their actions and behaviors. Psychic Energy: A concept in psychoanalytic theory referring to the force behind human drives, desires, and mental processes. Carnal Desires: Powerful feelings or appetites of a sexual nature. Sexual Activity: Any behavior that involves sexually arousement or stimulation, including intercourse and other erotic behaviors.