It's funny that all our consciousness, connections and links with humanity are with the Brain, our thoughts and our poems and words and I Love You's generate there, but the Heart is what people ask for in a relationship... I want your Heart. I want your Heart.
We can exist brain-dead, continue breathing and functioning with minimum pieces, but with even slightest damage to the Heart, we cease existing.
So what does a lover ask for? The one thing we need to keep the most protected.