Romantic love is an addiction: a perfectly wonderful addiction when it's going well, and a perfectly horrible addiction when it's going poorly.

Any kind of novelty or excitement drives up dopamine in the brain, and dopamine is associated with romantic love.

Women are naturally prone to compete over their mates.

In courtship, who wins and who loses will determine who passes on their DNA to tomorrow.

When people tell you to walk a certain way, it's like not thinking of a purple tomato. You can't not do it.

Your sweetheart calls you by another's name. His eyes linger too long on your best friend. He talks with excitement about a girl at work. And the fire catches. Jealousy - that sickening combination of possessiveness, suspicion, rage, and humiliation - can overtake your mind and threaten your very core as you contemplate your rival.

Haiti is the poorest country in the western hemisphere; some say the poorest in the world.