This image is looking at the way people people react in social situations. I am basing my idea on people using different masks to portray themselves in comfortable and uncomfortable circumstances.

As people use social masks they will have more than one. Here the subject is deciding which one to put on before going out for the day. Taking the mask off reveals no features as the social mask fulfills that characteristic. As per in this scene, one mask resembles a happy face while the other is grumpy. This opens up the possibility for him to have a positive or negative mood throughout the day.