A four-leaf clover is often considered good luck, but it is also part of an Irish love ritual.

In some parts of Ireland, if a woman eats a four-leaf clover while thinking about a man, supposedly he will fall in love with her.

A study of college students who had just been rejected by their sweethearts showed they had strong activity in the brain associated with the insular cortex,

...the part of the brain that experiences physical pain.

Antidepressants may compromise romantic love because they enhance serotonin levels.

Higher serotonin levels blunt emotions and inhibit obsessive thoughts about the lover, both crucial components of love.

Since ancient Greece, the apple has been a symbol of love.

The Celts believed that the apple represented love because it lasted so long after being picked.

When a person falls in love, the ventral tegmental area in the brain floods the caudate nucleus with dopamine.

The caudate then signals for more dopamine; the more dopamine, the higher a person feels. The same system becomes activated when someone takes cocaine.

When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.

European males subconsciously seek out women whose waist circumference is about 70%t of their hips.

Beauty icons such as Audrey Hepburn, Venus de Milo, and even Twiggy had a waist ratio of exactly 70%

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