“Because this isn’t just for here! I want future validity, and that means going through every step, including contract, even if you think it’s stupid. She deserves solid ground to stand on later if she needs it.” If she needed or wanted to claim the connection when he was no longer there to endorse it. “And I’m not Asgardian except by choice, I remind you, so I want my own solid ground. It’s not good enough just to decide ‘we’re married’ and be done with it for me. That’s at least three reasons, pick one you like.”