Libido

In psychology, libido (/lɪˈbiːdoʊ/; from the Latin libīdō, 'desire') is psychic drive or energy, usually conceived of as sexual in nature, but sometimes conceived of as including other forms of desire.^[1] The term libido was originally developed by Sigmund Freud, the pioneering originator of psychoanalysis. With direct reference to Plato's Eros, the term initially referred only to specific sexual desire, later expanded to the concept of a universal psychic energy that drives all instincts and whose great reservoir is the id.^[2][3][4] The libido - in its abstract core differentiated partly according to its synthesising, partly to its analytical aspect called life- and death-drive - thus becomes the source of all natural forms of expression: the behaviour of sexuality as well as striving for social commitment (maternal love instinct etc.), skin pleasure, food, knowledge and victory in the areas of species- and self-preservation.^[5][6]

In common or colloquial usage, a person's overall sexual drive is often referred to as that person's "libido". In this sense, libido is influenced by biological, psychological, and social factors. Biologically, the sex hormones and associated neurotransmitters that act upon the nucleus accumbens (primarily testosterone, estrogen, and dopamine, respectively) regulate sex drive in humans.^[7] Sexual drive can be affected by social factors such as work and family; psychological factors such as personality and stress; also by medical conditions, medications, lifestyle, relationship issues, and age.