Father-Son Relationship

In The Road, the two main character are a father and son trying to survive in a post-apocalyptic world. The father's only concern, and reason for living is to ensure his son's survival for as long as he can. I think their relatiionship is much stronger than most father-son relationships for two reasons:
1. they're living in a POST-APOCOLYPTIC world. They rely on eachother for suvival and are eachothers reason to stay living.
2. There is no mother in the picture. The Boy's mother, The Man's wife, committed suicide- were presuming not long after whatever caused their circumstances happened. The father knows that he's all thats keeping his son alive. If he dies, his son will almost indefinitely follow shortly after.

The fathers only real concerns are for his son. He wants his son to have the most enjoyable experiences possible, considering theor situation. The father has frequent flashbacks of the world as it was before whatever caused this apocalypse, and of his much different childhood. He, however, does not share any of these memories with his son because he does not want to tarnish the world as e knows it with th realization that it could be- and was- much better.

I also think that the son realized that they depend on eachother for survival. He often asks questions about what would happen if one of them died- questions which the father seems very hesitant to answer.