Halloween costume ideas?

We found out a few nights ago that one of our "couple" friends is hosting a Halloween (costume) party this year. I love dressing up for Halloween but haven't done it in years, mostly because I have no reason to. Rodney and I are already brainstorming for ideas of what we can be. I would like to dress as a couple.

Leave me a comment with your suggestions. Come on, you know you want to.