What are some good costumes for couples?

I know there are a million out there, but I can't think of any good ones. If it matters, my girlfriend and I are both 31.What are some good costumes for couples?
beth and dog the bounty hunter! hilarious!!What are some good costumes for couples?
Glow stick Costumes - new this year and really unique. They are comfortable! Shop 4 best prices.
Sony and Cher


Robin Hood and Maid Marion


Mickey and Minnie


Shrek and Princess Fiona


Woody and Jessie (from Toy Story)



Ren and Stimpy, Fred and Wilma, Barney Fife and Velma Lou,

eye liquid