Actually the human brain is designed to fire off little keys that give the feeling of being in love, whether it be with another human or something as simple as a belonging they care deeply about, like a truck or a piece of jewelry. So actually love is something that the brain gives us and is also linked to the heart. Some patients after a heart transplant will get some fears or emotions from the donator's heart. I could go on forever but you've probably stopped reading this, and I'm just some stranger on the internet you've never even known or care about but thanks for taking the time to read this. And of course keep your heart open.
Yeah, my younger brother had to do research in a class and one man received a heart from someone who had tied in an accident with an eighteen wheeler, a few months after the transplant he was out driving and suddenly felt terrified as a trucker was making a right turn onto the road next to him. He said his heart started racing even though the truck had plenty of room for it's turn.
reminds me of this documentary I watched called "what the #@&% do we know" it talked about parallel worlds and world shifts and how our brains literally can change the structural make up of our bodies. mind blowing stuff.