[https://en.wikipedia.org/wiki/Silphium_(antiquity)](https://en.wikipedia.org/wiki/Silphium_(antiquity))
Depends on the theory you believe, I had always heard that Silphium was a very popular aphrodisiac in ancient roman era, and the seeds were heart shaped… things sorta got tied together. What is generally accepted is the modern heart shape was descendant from the Silphium seed shape.
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