Do you know the real story behind the "heart shape"?
The shape of a "heart" was originally not identified by a human's heart but by 2 swans. Yes, swans. Here is the explanation: when 2 swans face each other, their necks bend into a shape of a "heart".
This is where the name of the shape "heart" was originally identified from; and the human's heart was only named "heart" as well after this.