It maybe silly ... but i want to know how the heart shape become like what we k

Question:

It maybe silly ... but i want to know how the heart shape become like what we know ?

i mean it is not like the real heart shape ...how it is become like that ... and become internationally recognized ???

Best Answer - Chosen by Asker: Well, the real heart is not a very attractive shape and we like symmetry! It is just a cleaned up version of an actual heart! I think.....:)