http://www.npr.org/blogs/krulwich/2014/04/22/305582368/introducing-a-divorce-rate-for-birds-and-guess-which-bird-never-ever-divorces 

excerpt:
 "There are few distractions in the life of an albatross, so the birds concentrate on things that matter most — such as one another. They often sleep with the head of one bird cozily pillowed against the breast of its mate," 

I think a lot of you might enjoy the whole article.