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Libido, colloquially kent as sex drive, is a person's oweraw sexual drive or desire for sexual activity. Sex drive is influenced bi biological, psychological an social factors. Biologically, the sex hormones an associatit neurotransmitters that act upon the nucleus accumbens (primarily testosterone an dopamine, respectively) regulate libido in men an weemen.[1]

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  1. Fisher HE, Aron A, Brown LL (December 2006). "Romantic love: a mammalian brain system for mate choice". Philos. Trans. R. Soc. Lond., B, Biol. Sci. 361 (1476): 2173–86. PMC 1764845. PMID 17118931. doi:10.1098/rstb.2006.1938. The sex drive evolved to motivate individuals to seek a range of mating partners; attraction evolved to motivate individuals to prefer and pursue specific partners; and attachment evolved to motivate individuals to remain together long enough to complete species-specific parenting duties. These three behavioural repertoires appear to be based on brain systems that are largely distinct yet interrelated, and they interact in specific ways to orchestrate reproduction, using both hormones and monoamines. ... Animal studies indicate that elevated activity of dopaminergic pathways can stimulate a cascade of reactions, including the release of testosterone and oestrogen (Wenkstern et al. 1993; Kawashima &Takagi 1994; Ferrari & Giuliana 1995; Hull et al. 1995, 1997, 2002; Szezypka et al. 1998; Wersinger & Rissman 2000). Likewise, increasing levels of testosterone and oestrogen promote dopamine release ...This positive relationship between elevated activity of central dopamine, elevated sex steroids and elevated sexual arousal and sexual performance (Herbert 1996; Fiorino et al. 1997; Liu et al. 1998; Pfaff 2005) also occurs in humans (Walker et al. 1993; Clayton et al. 2000; Heaton 2000). ... This parental attachment system has been associated with the activity of the neuropeptides, oxytocin (OT) in the nucleus accumbens and arginine vasopressin (AVP) in the ventral pallidum ... The activities of central oxytocin and vasopressin have been associated with both partner preference and attachment behaviours, while dopaminergic pathways have been associated more specifically with partner preference.