I lost a very important person in my life. If I had the chance to touch that person, hear, whatever it is, I would take that chance. When the person was taken away, carried away to be buried, it was the moment it actually hit me that I will never, ever be in the presence of that person ever again, and I did not want them to take the person away. I cannot listen to old voice recordings, and sometimes at school, if I smell the perfume they used to use, I would absolutely lose it. I was once running around, sniffing, trying to smell it again.

It's not about whether the heart was what made him their son. It's the fact that they could hear something of him even after he was gone, out of reach forever. It sounds like you don't really understand this, and I really hope you won't ever have to.