Kaya Mclaren said this quote

Most people think love comes from the heart or soul. The heart simply pumps blood, so love can't be created there. Where is the center for what appears to be a person's soul? The Brain. And what is created there, Jilly? That's right--dopamine. What does dopamine do? Creates feelings of love and euphoria. How do we get our brains to create more? Drugs, massage, and/or sex. Boil it down and it's all just dopamine.