When you experience lust, the hypothalamus in your brain stimulates the release of the sex hormones testosterone and estrogen.
These hormones drive reproduction, an evolutionary need shared by all living creatures.The next level of romantic love – attraction – involves the brain’s reward center, which produces serotonin, dopamine, and norepinephrine.
All these feel-good hormones get released during pleasurable activities like bonding with loved ones and having sex. Dopamine and norepinephrine make you feel giddy and euphoric, which explains why you may have “butterflies” when falling in love.A surge in these neurotransmitters creates an intense desire and longing for the person you’re attracted to, and you can’t seem to get enough of them.
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