You're completely correct in comparing this to relationships (though maybe dating is better than marriage, but still...). Basically any pairing problem is prim

You're completely correct in comparing this to relationships (though maybe dating is better than marriage, but still...). Basically any pairing problem is prime territory for a technical solution. That's why we see so many attempts (and even successful ones) at dating sites. And job sites. And apartment sites. Whenever you're involved with many options to choose something, and the other party has the chance to reject you, you have an interesting problem. Am I missing any big ones besides housing, courtship and employment? I guess higher education could be considered, but it's a little lopsided: more of a few-to-many relationship.