‘Love can be distilled into three categories: lust, attraction, and attachment; though there are overlaps and subtleties to each, each type is characterised by its own set of hormones; testosterone and oestrogen drive lust; dopamine, norepinephrine, and serotonin create attraction; and oxytocin and vasopressin mediate attachment (…); the testes and ovaries secrete the sex hormones testosterone and oestrogen, driving sexual desire; dopamine, oxytocin, and vasopressin are all made in the hypothalamus, a region of the brain which controls many vital functions as well as emotion; lust and attraction shut off the prefrontal cortex of the brain, which includes rational behaviour…“. [emphasis added].
https://sitn.hms.harvard.edu/flash/2017/love-actually-science-behind-lust-attraction-companionship/