Check out these wedding bands by Sakurako Shimizu. They are molded into a waveform representation of your partner's voice recorded saying "I do," or any phrase you choose. A very cool and unorthodox idea!
Check out these Portal-themed wedding rings by Etsy user 17thbit! Now you're thinking doing everything in your entire life with Portals!
Honestly, if you're even considering this kind of thing... you've got issues.
And nary a portal shall ever separate them.
Just try to make sure he doesn't eat the ring. Then we'll have to wait for him to spit up a pellet and then dig it outta there. Ew.
ryan brenzier on flickr http://www.flickr.com/photos/carpeicthus/552551812/