According to Sigmund Freud, the libido is part of the id and is the driving force of all behavior.
While the term "libido" has taken on an overtly sexual meaning in today's world, to Freud, it represented all psychic energy and not just sexual energy.1
Freud believed that the id was the only part of personality present from birth. The id, he suggested, was a reservoir of unconscious, primal energy.2
Boag S. Ego, drives, and the dynamics of internal objects. Front Psychol. 2014;5:666. doi:10.3389/fpsyg.2014.00666
The id seeks pleasure and demands the immediate satisfaction of its desires. The id serves as the source of our wants and impulses.
And its true. Not kidding.