What do you own?
Some may answer this question economically - I own my house (or co-own with my mortgage lender). I own my car (or co-own with the bank who holds my auto loan). I own my phone (or lease it from my cell service company). I own my computer (but pay fees for the software and licenses on it). I own my television (but pay a recurring fee to put cable channels on it). So, I own a lot, but only halfway.
Some may answer this question inter-personally - I have a wife, two kids, a dog, good parents, manageable in-laws. But, these people are not my personal property, so I do not have true ownership rights over them, even though there are certain laws that grant me care and custody of my children, I do not have full ownership of all their person. So, I have relationships, but I do not own people.