How do you square those two contradictionary statements?
They aren’t contradictory, you’re just retarded and, frankly, probably autistic.
Ownership invests actual rights. E.g. ownership of a piece of land invests the right to exclude others from that land.
You never “own” a romantic partner in that sense. But you do “have and hold” them in such a way that society generally looks down upon someone else engaging with them romantically. If you want to call this some form of mutual ownership, fine. It’s not accurate IMO, but whatever.
Now, once a relationship ends, that sort of “mutual ownership” ceases. It’s not morally wrong to date someone’s ex in that same way it is to date someone’s girlfriend or wife. Not even close.
BUT, because people are as much emotional animals as they are rational ones, the courteous thing to do is to understand their emotions. If your close friend is hung up over the ex you want to date, and dating that ex would bring them emotional pain, you shouldn’t date them.
Not because of any sense of ownership they may have over the ex, but because a good friend doesn’t hurt their friends.
This has nothing to do with “bro-code” or whatever. This is just friendship basics. People can have irrational and emotional attachments in relationships that linger. You may bring them emotional pain by dating their ex. Since a good friend doesn’t harm their friends, you should ensure that dating their ex won’t bring about that harm.
To bring this back to the thread topic: ignoring these simple kindnesses is how you get degenerates like Juju: People who don’t care at all about how others feel, or how their actions may harm them. All that matters is getting what they want.