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

Research shows that couples who have a lot of similarities, including intellectual compatibility, end up staying together.

Men have a psychological need to show off their courage and strength. When he sees you talking to another guy, that instinct kicks in and he jumps to protect you and prove he's worthy of your love.

Women have a better sense of smell than men do, and it's even sharper in the middle of their menstrual cycle, when estrogen levels peak and women are more likely to be deciding whether a man's attractive.

Women are better at reading body language everywhere in the world. As a matter of fact, it's associated with the female hormone estrogen. Women are better at figuring out of tone of voice, reading your face and posture and gesture.

Romantic love is one of the most addictive substances on Earth.

The human brain is built to compare; it's Darwinian to consider an alternative when one presents itself.