The "heart shape" () is an ideograph used to express the idea of the "heart" in its metaphorical or symbolic sense as the center of emotion, including affection and love, especially (but not exclusively) romantic love.

The "wounded heart" indicating love sickness came to be depicted as a heart symbol pierced with an arrow (Cupid's), or heart symbol "broken" in two or more pieces.

https://en.wikipedia.org/wiki/Heart_(symbol)

"I wanted very much to learn to draw, for a reason that I kept to myself: I wanted to convey an emotion I have about the beauty of the world."
Richard Feynman
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