This song is pretty similar to what is suffered while having alzheimer. Suddenly, the life you thought you had, the person you thought you were, you're not anymore. Memories make up such a vital part of us that without it.. we'd probably be nothing. So not being able to remember someone's kisses, or someone's face, could lead to seeing us in the mirror and not knowing what is in front of us. And all for reasons unkown. Alzheimer comes, there's no explanation behind it.