Why Is This Shape Called A Heart?

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SOURCES AND FURTHER READING
Heart On OED:
Heart On Etymonline:
The Origin Of The Heart Shape:
Why Do We Associate Love With The Heart?:
Chest pains When Feelings Are Hurt:
How did the human heart become associated with love?:
Why Do The Hearts We Draw Look Nothing Like The Shape Of Real Hearts?:
A Brief History Of Pictograms & Ideograms:
Origin Of Playing-Card Symbols:
History Of Valentine:
Valentine On Etymonline:
Valence:

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