A multisig wallet with some Bitcoin is actually a great metaphor for a marriage. I gifted my oldest friend and his bride Bitcoin in a 2 of 3 multisig setup. They can only access their Bitcoin together, it's impenetrable, and what it protects grows in value over time. I think they probably valued the letter more than the multisig setup.

That said, I wrote seven pages of instructions on how to rebuild and use their multisig. I wouldn't be surprised if the next time I visit, they ask I set it up for them.