Adrienne, I was waiting for that parent/child example. When one thinks about unconditional love, it is really parent-child relationship.
But, there is flaw. I don't have a child, but I think that people love children because they are little, defenseless, and they need love. We are
afraid of what might happen to them if we don't provide that care.
In my philosophy classes, we have learned about how a mother wolf has brought up two human girls. I don't remember the names, but I should mention them if I find them again.
In my humble opinion, mother wolf has taken care of these children because she has mistaken them for defenseless wolfies. Why do parents trust nannies?
I could expand furthermore to human relationship, but I will get punched by people
Fear is the real driving force...