From Fedora Project Wiki
Can we really "Own" Contacts? What about other people? I for example would love to own a few people to help out with chores and things, and perhaps even someone to take care of my email.
It's about the relationship
Although I swapped "steward" for "owner", the key is the owning is about the relationship with the contact, not owning the contact directly. Still, I've never been big on owning in a collaboration setting, the steward concept seems to work better. :)