Psychology of love and attraction. Although poets and songwriters can put many of our romantic thoughts and feelings into words, love is so inexplicable we need the help of science to explain it.

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What factors do you think influenced the development of these relationships?

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Involvement of neural reward systems.

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Reciprocity is the give and take in relationships.

You can click and drag on a bar to move the bar up, if you think that condition was more painful for the subject than the baseline control.

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So does physical attractiveness matter at all?