Why would anyone set out to break the heart of someone they loved? Why would anyone intentionally cause that kind of pain?
Why did people kill each other?
Because they enjoyed it. Was it really that simple? To achieve a soul-shattering, it is better if the perpetrator has been through the same experience. Hurt people hurt people more skillfully. An expert heartbreaker knows the effect of each incision. The blade slips in barely noticed, the pain and the apology delivered at the same time.