Couples on the Train

I had just finished reading a short story in a recently accuired early collection by Raymond Carver, a story about a young married couple that watches their neighbours' house - feed the cat, water the plants etc. - whenever they're gone away, which happens quite frequently. It's only five pages long and I really like it. It has a very sweet subtext and leaves room for questions at the end. 

I looked out the window, my index finger between the pages, and thought about the couple. I thought about marriage and about how I would want my future girlfriend to become much more than my future wife. I wasn't paying attention to the wide fields and tall trees outside, they were merely a blurry background to my invisible thoughts, but then two black birds flew across my sight.

As soon as I spotted them I followed their motions with my eyes. They flew in quite a distance, so that I was able to keep track of them, and it looked like they were dancing. They didn't mind being watched, didn't care what the other birds or anybody else would say. They looked strong together, because they were happy together. I smiled and thought, what a great couple.