There's all kinds of reasons that you fall in love with one person rather than another: Timing is important. Proximity is important. Mystery is important. You fall in love with somebody who's somewhat mysterious, in part because mystery elevates dopamine in the brain, probably pushes you over that threshold to fall in love.

Romantic love is an addiction.

Blushing is thought to be linked to increased levels of norepinephrine in the brain, which may be associated with romantic feelings. It signals that we are interested and excited, which is attractive to men.

You've got to remember that men are men and women are women. And although a lot of similarities, there are some real differences.

At first I assumed hate was the opposite of love. But it isn't. The opposite of love is indifference.

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

Falling in love was not really a choice; it just struck me.