I've seen a bunch of really geeky 2-part rings out there, in case you're a nerdy tech-lover who has a human lover. Or robot lover. Whatever.

Nut/Bolt Rings - they screw into each other! Link



Ethernet CAT5 ring and Mac RS422 plug ring - Link
 


The Google Counter ring - which uploads the amount of google hits your name gets.


But this one is not for a couple because if you wore this I seriously doubt you could find a mate. Unless... you spotted her identical google counter ring from across the room, and knew it was kismet!  Congratulations to the 2 most egotistical, self-obsessed fashion-challenged dorks in the world! Link

Oh well... I guess it could be worse... I mean it could be Pac-Man or a Mac key or video-integrated or something.