One possible theme could be identity. If Parker has some sort of mark or feature on his back, it might be related to how he sees himself or how others perceive him.
Another theme might be redemption. Perhaps something about Parker's back is a reminder of a past wrong, and the story could be about his journey towards making amends. For instance, if he has a tattoo on his back from a wild youth, and he is now trying to become a more responsible person.
The 'parkers back short story' might be about a character named Parker. It could potentially explore his backstory, his relationships, or some significant event related to him. However, without actually reading the story, it's hard to be more specific.
The theme of self - exploration could be present in the 'all the way back short story'. By going all the way back, the character is delving into their past, which can be a way of understanding themselves better. They might discover hidden aspects of their personality, forgotten dreams, or the roots of their current problems. This exploration can lead to personal growth and a new perspective on life.
Segregation could be a theme. If set in a historical context, it might show how the back of the bus was reserved for certain groups, like African - Americans during the era of racial segregation in the United States.
One possible theme could be isolation. Silence often implies being alone or cut off, and in a back story, it might show a character's struggle with feeling isolated from society or their loved ones.
Nostalgia could be a theme. If it's a story looking back at the time when someone was in pampers, it's often about reminiscing and feeling nostalgic for that period of life. Also, growth and development could be themes. The story might show how a person has changed from being a baby in pampers to who they are now.
Another theme could be the loss of innocence. The war would have exposed people to violence and death, and those involved might have lost their naivete. For example, young soldiers going to Vietnam and coming back changed forever. Also, a theme of friendship might be present. Soldiers or civilians might form strong bonds during those difficult times to support each other.
One possible theme could be regression. It might explore the idea of going back to a more innocent or dependent state, like infancy when diapers are used.
One possible theme could be love. The letter might be a love letter expressing deep affection and passion.
One possible theme could be heroism. There were many heroes on 9/11, from the firefighters who rushed into the burning buildings to the passengers on Flight 93 who fought back against the hijackers.
One possible theme could be adventure. Just like the journey 'there and back again', it might involve exciting experiences related to water, like exploring uncharted waterways.