The first thing I noticed was that the Husband had spine problems as his spine was really crooked and he could not walk with a straight back like normal people. What caused me to constantly look at them is he was holding onto the Wife's hand as they walk. 

Usually, old couples that I see in the public will walk along each other's side but they will not hold their partner's hand so I was really intrigued by this scene. Furthermore, the way the Husband held the Wife's hand just feels different as compared to other couples. It was a deep feeling as he guided and led her to the correct direction to the train platform.

The Wife looked much healthier physically than the Husband so I was a little surprised and curious why the Husband was constantly looking out for her because normally in my opinion, it should be the other way around as the healthier one looks after the weaker one. It further "tickled" my curiosity!!