Facebook just started rolling out brand new COUPLES PAGES. They didn't ask first . . . you can't delete them . . . and you can't opt out. If you list that you're in a relationship with someone, and they say they're in a relationship with you, you've got one. --You can find your couples page by going to facebook.com/us. It'll automatically forward you.
Basically it's just a compilation of photos where you've been tagged together, status updates you've both commented on, and your list of mutual friends.
If you have an issue with this you could just delete your account and make all these privacy issues go away . . .