“I have an ipod” refers to a thing you own. “I have a dog,” or a child, or a spouse, implies a relationship, a mutuality between sovereigns.
Ownership denotes control. Relationship is about reciprocity. Always.
Ownership is unilateral. It’s mine. In relationship, something is always owed to the other. Ours. Always.
As a general rule, if a thing is alive — and for the animists among us, this includes pretty much everything — what you have is a relationship. Even if the law says otherwise.