Valentine's Heart

Everywhere you look the last week there have been heart shaped offerings on display, on cards, in shop windows, moulded in chocolate but although i have never actually seen a real human heart, the ones i have seen in pictures are nothing like heart shaped.
There are a few theories how the heart shape got it's shape ranging from the shape of the female genitals to the shape of a mans testicles. It could have come from the shape of the tips of cupids arrows as painted by renaissance painters or just as easily have been based on the shape of a backside but i once heard the best explanation that i have always gone with, the shape made by two people kissing.
The chests pressed together, noses touching and the two people forming a perfect Valentine heart of space between them. Far better than the idea of an arse.