There are quite a few!
Lust, our powerful sexual feelings, need a heady mix of testosterone and estrogen. Interestingly, both genders experience a rush of both types of hormones. Then having sex with someone can release oxytocin.
Romance, or attraction to one individual, is hallmarked by feelings of intense longing and desire, filling your thoughts with yearning for the other person. You want emotional union, not only sex. The major brain chemicals for these feelings are dopamine, opioids, adrenaline, and serotonin.
Long-term attachment and lasting bonds of affection develop over time. These bonds are cemented not only by shared experiences and mutual displays of dependability, but also by the brain chemicals vasopressin and oxytocin. Known as the cuddle hormone, oxytocin is also responsible for the deep bonds between mothers and their babies. It plays a role throughout our love relationships, but may be especially important for keeping the relationship going.
Looking for verifiable information on the science of attraction and relationships? We’re a neuroscientist and a biological anthropologist eager to help you put the Anatomy of Love to work in your own life.