My older brother, who dated steadily from the age of 18 until he married finally at 44, sent me this video. Helen Fisher asked herself why we crave love so much, even to the point that we would die for it?

One thing she concludes is that our brain systems are designed to keep the human race going, not to make us happy. Since we feel lust for many people, romantic love is a brain system designed to focus our attention on one person. Focusing on one person allows us to settle down and have children with them.

The third brain system is long-term attachment, which is designed to keep us together long enough to raise our children.

But I don’t say it nearly as well as Helen:

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