Is the "spark" a real indicator of potential, or just a chemical trick that fades, leaving the real work of love to begin?

Is the spark a real indicator of potential, or just a chemical trick that fades, leaving the real work of love to begin?
A real indicator of potential
Just a chemical trick that fades
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Is the "spark" a real indicator of potential, or just a chemical trick that fades, leaving the real work of love to begin?
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