To be fair, the concept of marriage slightly predates the concept of ACID.

And another point is - what's the timeout on a marriage vow that's unreciprocated? If I trothed myself to someone right now, how long do they get to complete the transaction?

And what if the timeout is infinite? Then, I might wait a while and decide that my love is unrequited. So I go off and find myself another pretty, beautiful, intelligent thing - who's slightly less intelligent than the first, and reciprocates my vows.

Now, I can be attacked by the first person I attempted to marry - if they decide to marry me, they can, and make me a bigamist. Possibly without me ever knowing, and certainly without myself ever intending this to happen.

An aside is what we should call such an attack. Denial Of Monogamy? Denial Of Atomicity?

Surely the Vatican must have some dusty old parchment upon which these things are defined... A Godly RFC, if you will...