1) Neither of us has seen it and we both want to see it
2) One of us has seen it and is shocked and/or disgusted that the other has never seen it.
Hence me sitting on Sunday and watching all of Schindler's List while nursing a nasty cold. I'm glad I saw it though. I thought it was excellent.
Tonight we watched Alien because I have never seen it and the rental company sent us both that and Aliens and things should be watched in order if at all possible.
I wasn't impressed, although I'm sure I would have been scared witless 25 years ago. We did however, have an amusing evening mocking it and coming up with our own spoof version starring Orlando Bloom, Samuel L Jackson and Lindsay Lohan which would probably be the best film ever made.