“When the eyes of a woman that a man finds attractive look directly at him, his brain secretes the pleasure-inducing chemical dopamine - but not when she looks elsewhere.”

“When he looked up at Annabel, he was just a man, looking at a woman, praying and hoping that she loved him the way he loved her.”

“When you can not find someone, it is because you've been misdirected to look elsewhere”

“That's what falling in love really amounted to, your brain on drugs. Adrenaline and dopamine, oxytocin and serotonin. Chemical insanity, celebrated by poets.”

“There is nothing so inspiring to a woman as seeing love in a man's eyes when he looks at her.”

“Vanderbilt University scientists had discovered chemically testable differences between psychopaths and others. One was the variance in levels of dopamine, a naturally produced chemical that contributed to a person’s motivation and pleasure. Those scientists concluded that the elevated level of dopamine was not an additional symptom to the personality abnormalities already known, but rather responsible for the personality changes.”